macalculatriceenligne.com

List all available tool bundles (grouped by domain).

Get the list of tools in a specific bundle.

Calculate French income tax (IR) for 2026 using progressive brackets per Article 197 CGI with family quotient system.

Convert French gross salary to net salary for 2026 (cadre, non-cadre, or civil servant).

Calculate French VAT (TVA) — convert between HT (before tax) and TTC (after tax).

Calculate mortgage/loan monthly payment, total cost, and optional amortization schedule.

Compute compound interest growth A=P(1+r/n)^(nt).

Compute simple interest I=P·r·t.

Calculate monthly loan payment for any generic loan.

Compute break-even point in units and revenue.

Calculate gross margin, net margin, and markup percentage.

Compute Return on Investment as a percentage.

Calculate discounted price with optional successive discounts.

Calculate VAT/GST/sales tax for any country with custom rate.

Calculate unit cost price from raw materials, labor, and overhead.

Compute debt-to-income (DTI) ratio.

Adjust a nominal amount to a target year using a constant inflation rate.

Compare purchasing power between two years.

Calculate percentages: value of total, percentage change, what percent.

Compute simple, weighted, geometric, or harmonic mean.

Find missing side of right triangle using Pythagorean theorem.

Compute area for common 2D shapes (rectangle, triangle, circle, trapezoid, etc.).

Compute volume for common 3D shapes (cube, cylinder, sphere, cone, prism).

Calculate perimeter/circumference for common shapes.

Calculate GCD (PGCD) and LCM (PPCM) of two integers using Euclidean algorithm.

Solve 1st degree (ax+b=0) or 2nd degree (ax²+bx+c=0) equations.

Calculate nth term and sum of arithmetic or geometric sequence.

Perform fraction operations: add, subtract, multiply, divide, simplify.

Calculate logarithm in any base (natural, common, binary).

Calculate factorial, permutations P(n,r), and combinations C(n,r).

Compute sin, cos, tan and inverse functions in degrees or radians.

Convert numbers between bases (binary, octal, decimal, hexadecimal, any base 2-36).

Convert temperature between Celsius, Fahrenheit, and Kelvin.

Convert distance between metric (m, km, cm, mm) and imperial (in, ft, yd, mi) plus nautical miles.

Convert weight/mass between kg, g, mg, lb, oz, st, tonne.

Convert volume between L, mL, cL, fl_oz, cup, tbsp, tsp, gal_us, gal_uk.

Convert area between m², km², ha, are, acre, ft², yd², cm².

Convert speed between km/h, mph, m/s, knots, ft/s.

Convert pressure between Pa, kPa, MPa, bar, psi, atm, mmHg, mbar, torr.

Convert between digital storage units (binary and decimal).

Convert energy between J, kJ, cal, kcal, kWh, BTU, eV, ft-lb.

Convert angle between degrees, radians, gradians, turns, arcminutes, arcseconds.

Convert time between seconds, minutes, hours, days, weeks, months, years.

Convert fuel consumption between L/100km, mpg-US, mpg-UK, km/L.

Convert cooking measurements between ml, L, g, kg, cup, tbsp, tsp, fl_oz, oz.

Convert shoe sizes between EU, US (men/women), and UK systems.

Compute simple or weighted grade average.

Calculate binomial probability P(X=k) and cumulative P(X<=k).

Calculate descriptive statistics: mean, median, mode, std dev, quartiles.

Solve rule of three (cross-multiplication): if a→b, then c→?

Compare unit prices across packages to find the best deal.

Compute restaurant tip and per-person split.

Estimate French Brevet (DNB) score from grades and continuous-control marks.

Estimate French Baccalauréat final score from grades and coefficients.

Estimate ECTS credit workload (1 ECTS ≈ 25-30 study hours).

Estimate Parcoursup admission score from bac + lycée grades.

Calculate numerology life path number from birth date.

Determine Chinese zodiac animal and element from birth year.

Compute physical, emotional, and intellectual biorhythm cycles for a date based on birth date.

Calculate exact age in multiple units from birth date.

Find the day of the week for any date (Zeller's congruence).

Compute cement, sand, gravel, and water for a given concrete volume (NF DTU 21).

Compute paint liters needed for a surface with chosen number of coats.

Compute tiles needed including a waste margin (default 10%).

Compute slope as percentage, angle in degrees, and ratio.

Calculate staircase dimensions using Blondel formula.

Compute thermal resistance R = thickness/lambda.

Compute bricks or blocks needed for a wall including waste margin.

Compute gravel volume (m³) and weight (tonnes) for a surface and depth.

Compute electrical cable cross-section (mm²) per NF C 15-100.

Compute wallpaper rolls needed for a room with pattern repeat factor.

Compute Ohm's law: V=I·R.

Compute force using Newton's second law F=m·a.

Compute speed of sound in air at a given temperature.

Compute dilution C1·V1=C2·V2.

Compute pH from H+ concentration or vice versa.

Compute electrical power for single or three-phase circuits.

Compute density, mass, or volume given the other two.

Compute remaining quantity after radioactive decay.

Compute fuel cost for a journey.

Compute reaction + braking distance by road condition (dry/wet/icy).

Compute electricity cost for an appliance.

Compute the rent-to-income ratio.

Scale recipe ingredients up or down by a factor or new servings count.

Compute swimming pool water volume in m³ and liters.

Estimate annual personal carbon footprint (tCO₂e).

Compute restaurant tip following local custom (US 18-22%, FR included, JP no tip, etc.).

Compute total curtain width using a fullness factor (1.5-3.0×).

Compute soil volume (m³) and number of bags needed for a garden bed.

Estimate moving volume (m³) by home type and contents.

Compute flooring cost including waste margin.

Calculate US federal income tax for 2026 using progressive brackets with standard deduction.

Calculate US FICA taxes (Social Security + Medicare) employee share for 2026.

Calculate US 401(k) contribution, employer match, and total retirement savings.

Calculate US mortgage with PMI, property tax, and insurance estimates.

Calculate US capital gains tax — short-term (ordinary rates) or long-term (preferential rates).

Calculate US Child Tax Credit for 2026 with phase-out based on AGI.

Calculate US student loan repayment under standard, graduated, or income-driven plans.

Estimate US bi-weekly net paycheck after federal/state withholding and FICA.

Estimate annual US property tax by state using effective tax rates.

Compute US state income tax for a chosen state.

Calculate UK income tax for 2025/26 using HMRC progressive brackets with personal allowance taper.

Calculate UK National Insurance contributions (Class 1 employee) for 2025/26.

Calculate UK student loan repayments based on plan type and salary.

Calculate UK VAT — convert between net (ex-VAT) and gross (inc-VAT) amounts.

Compute UK Council Tax based on property band and local authority rate.

Calculate Moroccan income tax (IR) using DGI progressive brackets with family deductions.

Calculate Moroccan CNSS contributions (employee and employer shares).

Compute Moroccan VAT (TVA) — convert between HT and TTC.

Calculate Moroccan property income tax (profit foncier / revenus fonciers).

Calculate Senegalese income tax (IRPP) using DGI progressive brackets in XOF.

Calculate Senegalese social contributions (CSS/IPRES) for employee and employer.

Compute Senegalese VAT (TVA) — 18% standard rate.

Calculate Quebec provincial income tax (Revenu Québec) with basic personal amount deduction.

Calculate Canadian federal income tax (CRA) with basic personal amount deduction.

Calculate combined Quebec + federal income tax with the Quebec federal abatement (16.5%).

Calculate Quebec Pension Plan (RRQ) contributions for employee.

Calculate Canadian Employment Insurance (EI) premiums for Quebec and non-Quebec residents.

Calculate French notary fees (frais de notaire) for a real estate purchase.

Calculate French inheritance tax (droits de succession) based on relationship and amount.

Estimate French child support (pension alimentaire) based on income, custody and number of children.

Compute French property capital gains tax (plus-value immobilière) including duration abatements.

Calculate French auto-entrepreneur (micro-enterprise) net income and social charges.

Estimate French prime d'activité monthly amount (CAF benefit).

Estimate French housing aid (APL — Aide Personnalisee au Logement).

Estimate French basic retirement pension (retraite de base Assurance Vieillesse).

Calculate French severance pay for rupture conventionnelle or licenciement.

Estimate French unemployment benefit (ARE — Aide au Retour a l'Emploi).

Estimate net income from portage salarial (freelance via umbrella company).

Calculate Belgian personal income tax (IPP/PB) using 2026 progressive brackets.

Convert Belgian gross monthly salary to net salary (approximation).

Calculate Belgian VAT — convert between HT and TTC.

Calculate Belgian self-employed social contributions (cotisations INASTI).

Calculate Belgian meal voucher (cheque-repas / maaltijdcheque) benefit.

Estimate Belgian retirement pension based on career years and average salary.

Calculate Belgian benefit-in-kind for company car (avantage de toute nature voiture).

Compute Belgian donation tax (droits de donation) by region (Bruxelles/Flandre/Wallonie).

Calculate Swiss income tax — federal + estimated cantonal tax.

Convert Swiss gross monthly salary to estimated net salary.

Compute Swiss VAT (TVA/MWST) — convert between net (HT) and gross (TTC).

Calculate Swiss occupational pension (LPP / 2e pilier) contributions by age bracket.

Calculate Swiss pillar 3a tax savings (3e pilier lie).

Calculate Swiss wealth tax (impot sur la fortune) by canton.

Calculate Body Mass Index (BMI) and weight category.

Calculate Basal Metabolic Rate using Mifflin-St Jeor equation.

Calculate Total Daily Energy Expenditure from BMR and activity level.

Estimate calories burned during physical activity using MET values.

Estimate maximum heart rate using standard or age-adjusted formulas.

Calculate heart rate training zones Z1-Z5, optionally using Karvonen method.

Estimate ideal body weight using Lorentz and Devine formulas.

Estimate body fat percentage from BMI, age and sex using Deurenberg equation.

Compute recommended daily fluid intake by weight, activity, and weather.

Estimate 1 repetition maximum from submaximal lift using Epley, Brzycki and Lombardi formulas.

Calculate estimated due date using Naegele's rule and return trimester milestone dates

Calculate ovulation date and fertile window from last period and cycle length.

Estimate blood alcohol content (BAC) using Widmark formula.

Calculate recommended daily protein intake based on weight and fitness goal.

Calculate waist-to-hip ratio and cardiovascular risk level.

Calculate running pace (min/km) and speed (km/h) from distance and time.

Compute VMA (Maximal Aerobic Speed) from a fitness test result.

Estimate VO2max from VMA (maximal aerobic speed).

Predict race time for a target distance using Riegel formula.

Solve speed/distance/time — provide any 2 of 3 values to compute the missing one.

Estimate cycling power output considering gradient, speed and total mass.

Calculate swimming pace per 100m and SWOLF efficiency estimate.

Calculate 6 running training zones as speed ranges based on VMA.

Generate target split times for a marathon, half-marathon, or other race.

Calculate bicycle development in meters per pedal revolution.

Compute cycling gear ratio (braquet) and development per pedal turn.

Generate a full 1RM-to-12RM repetition table from a known lift using Epley formula.

Calculate days, weeks, approximate months and working days between two dates.

Count working days Mon-Fri between two dates with optional French public holiday exclusion.

Add two time durations and return the total in hours and minutes.

Calculate French overtime pay: first 8h at +25%, beyond 8h at +50% (weekly threshold 35h).

Calculate night shift pay (21h-6h) with configurable premium percentage.

Calculate exact age in years, months and days from a birth date.

Compute current UTC offset for a timezone, accounting for DST.

Calculate part-time work percentage and optional pro-rata salary.

Estimate retirement date from birth date and country legal retirement age.

Calculate French paid leave (congés payés): 2.5 days/month, max 25 working days/year.

Calculate total floor area and Carrez habitable area from a list of rooms.

Calculate roof surface area from building footprint and slope angle.

Calculate plaster volume and weight for a given surface and thickness.

Calculate max bending moment and shear for a beam under uniform distributed load.

Compute excavation volume (m³) and truck loads needed for a foundation, pool, or trench.

Calculate kinetic (½mv²), potential (mgh), mass-energy (E=mc²), or work (F·d).

Solve PV=nRT.

Solve c=λ·f for EM waves.

Calculate cable section from power, voltage, distance and max voltage drop.

Calculate thermal R-value: R = thickness/lambda.

Calculate car residual value: Y1:-25%, Y2:-15%, Y3:-10%, Y4-5:-8%, Y6+:-5%.

Calculate fuel consumption in L/100km and MPG from distance and fuel used.

French ecological malus 2026: CO2 g/km based tax on new vehicle registration.

French fiscal horsepower CV = (CO2/45) + (P_kW/40)^1.6.

Estimate annual car insurance from vehicle value, driver age and bonus-malus.

Compute water bill from cubic meters consumed and tariff bands.

Compare salaries across countries using PPP (FR=0.79, US=1.0, UK=0.81, DE=0.77, CH=1.36, BE=0.80).

Estimate shipping cost from weight, distance and service (standard vs express).

Calculate weekly and annual laundry cost (electricity + water + detergent).

Compare unit prices of grocery items — normalizes g→kg, mL/cL→L.

Calculate safe following distance using the 2-second rule (French highway code).

Compute total calories, protein, carbs, fat for a recipe and per serving.

Convert baking measurements between cups, tablespoons, grams, and milliliters for common ingredients.

Estimate cooking time for meat, fish, or vegetables based on weight, method, and doneness.

Return maximum recommended freezer storage duration for a food type.

Track caffeine intake against the safe daily limit (400 mg adult).

Compute alcohol units (UK) and grams of pure alcohol in a drink.

Compute food cost per serving from ingredient costs.

Check daily vitamin and mineral intake against RDA recommendations.

Calculate glycemic load (GL) per food and total for a meal.

Calculate water hardness in French degrees from calcium and magnesium concentrations.

Calculate daily dog food quantity based on weight, age and activity level.

Calculate daily cat food quantity based on weight, age and lifestyle.

Convert pet age (dog/cat) to human-equivalent years.

Compute aquarium water volume in L and US gallons.

Compute veterinary medication dose by pet weight (mg/kg).

Compute due date for animal breeding given mating date and species gestation period.

Estimate body condition score proxy (BMI) for dogs and cats.

Compute calories burned by dog and human during a walk.

Calculate fabric needed for a garment in meters (includes 10% for pattern matching).

Calculate yarn needed for a knitting project (meters and number of 50g/100m balls).

Find ring size in EU/US/UK/JP given finger circumference or diameter.

Calculate bra size in FR, US or UK system from underbust and bust measurements (cm).

Calculate hat size in FR/EU, US/UK systems and standard S/M/L/XL from head circumference (cm).

Approximate sunrise and sunset times based on latitude and day of year.

Compute current moon phase and illumination % for any date.

Calculate the distance to the horizon from a given height.

Estimate solar panel daily and yearly energy output by location and system size.

Estimate annual rainwater collection volume from a roof.

Calculate the perceived wind chill temperature (Environment Canada formula).

Calculate the apparent temperature (heat index) from temperature and humidity.

Estimate CO2 sequestration by trees over their lifetime.

Calculate total luggage weight and compare to airline limits (carry-on, economy checked, business checked).

Estimate jet lag recovery time based on timezone difference and direction of travel.

Estimate total trip budget by category (transport, accommodation, food, activities).

Determine voltage adapter and plug type needed for a destination country.

Calculate safe sun exposure time based on UV index and Fitzpatrick skin type.

Assess altitude sickness risk and recommend acclimatization schedule.

Calculate currency exchange with bank margin and show fees lost.

Estimate international shipping cost and delivery time by carrier and weight.

Compute the difference between two times or dates in seconds, minutes, hours, days.

Calculate estimated travel insurance cost based on destination, duration, age and activities.

Calculate gross and net rental yield for a real estate investment.

Compute French Pinel rental investment tax reduction (rates 2026).

Calculate LMNP (non-professional furnished rental) tax deficit.

Compute French taxe foncière (annual property tax).

Calculate French real estate agency fees using sliding scale.

Calculate mortgage insurance (assurance emprunteur) cost.

Calculate maximum loan capacity using French HCSF 35% debt ratio rule.

Check French PTZ (zero-rate loan) eligibility and maximum amount.

Compute UK Stamp Duty Land Tax (SDLT).

Compute net rental profitability after taxes and charges.

Calculate Carrez law surface area (French legal measurement).

Determine French DPE energy class from primary energy consumption.

Compute French property transfer tax (droits de mutation) by department.

Estimate detailed moving cost based on volume, distance and floor.

Compare multiple mortgage offers sorted by total cost.

Compute weekly water needs for a garden by area and plant type.

Calculate NPK fertilizer quantities needed based on crop type and soil type.

Calculate the number of seeds needed based on surface area, spacing and germination rate.

Compute compost volume produced from kitchen and garden waste over a year.

Estimate effective daily sunlight hours for a garden based on latitude, month and orientation.

Calculate recommended lawn mowing interval based on grass type, season and rainfall.

Estimate harvest date for vegetables based on sowing date and region.

Compute soil volume needed to fill a raised garden bed.

Calculate depth of field, near/far focus limits and hyperfocal distance for a camera lens.

Calculate the missing exposure value (aperture, shutter speed or ISO) given the other two.

Calculate hyperfocal distance and near/far sharp limits for a lens and aperture.

Calculate camera crop factor and equivalent focal length based on sensor width.

Calculate print DPI quality and maximum print size from image pixel dimensions.

Convert BPM tempo to millisecond delay times for different note values.

Calculate the frequency of a musical note based on equal temperament tuning.

Calculate total beats and duration for a musical passage in bars.

Calculate optimal reverb pre-delay based on room size and musical tempo.

Calculate guitar or bass string tension in pounds, kilograms and Newtons.

Compute crypto trading profit/loss including fees.

Compute crypto mining profitability after electricity costs.

Calculate staking rewards with optional compounding for a given APY and duration.

Calculate impermanent loss for a DeFi liquidity pool position when price ratio changes.

Calculate Ethereum transaction gas fee in ETH and USD.

Calculate DCA portfolio value and performance for recurring crypto investments.

Calculate French flat tax (30% PFU) on cryptocurrency capital gains at withdrawal.

Calculate portfolio allocation amounts by percentage for major crypto asset classes.

Calculate dice roll probability for exact values, minimum or maximum targets.

Calculate hypergeometric probability of drawing specific cards from a deck.

Compute the odds of winning a lottery for various prize tiers.

Compute probability of common poker hands (straight, flush, full house, etc.) given a starting hand.

Calculate expected value and profitability of a bet or investment decision.

Calculate water flow rate through a pipe using the Hazen-Williams formula.

Calculate recommended water heater tank size for a household.

Calculate the minimum pipe diameter required for a given flow rate and maximum velocity.

Compute required drain slope (% and cm/m) to ensure proper water flow per plumbing code.

Calculate water pressure loss in a pipe circuit including friction and elevation.

Calculate LMNP rental property amortization and annual tax deduction (French tax regime).

Compare SCI taxation under IS (corporate tax) vs IR (income tax).

Calculate concrete stair dimensions, volume and materials using Blondel's formula.

Calculate roof truss dimensions, rafter length and material quantities for a pitched roof.

Calculate body fat percentage using the US Navy circumference method.

Convert French school grades (out of 20) to GPA and academic mention.

Estimate Parcoursup weighted score from French baccalaureate component grades.

Convert between fuel economy units: L/100km, mpg-US, mpg-UK, km/L.

Universal AI-powered calculator — handles any calculation not covered by specialized tools.

Calculate gross rental yield from property price and monthly rent.

Calculate net rental yield after charges and vacancy.

Estimate French taxe foncière from cadastral value and commune rate.

Compute Loan-to-Value (LTV) ratio for mortgage risk.

Calculate debt-to-income ratio and maximum additional loan capacity.

Detailed breakdown of French notary fees by component (taxes, emoluments, debours).

Calculate French property capital gains tax after holding-period abatements.

Calculate rent increase allowed by French IRL index.

Compute one owner's share of condominium charges from the budget and tantièmes.

Compute compound interest with monthly contributions (savings plan).

Calculate interest savings from early partial loan repayment.

Compute real (inflation-adjusted) purchasing power of a future amount.

Project retirement savings vs need and identify shortfall.

Compute recommended emergency fund target (3-6 months of expenses).

Estimate years to double an investment using the Rule of 72.

Compute the present value (PV) of a future sum given a discount rate.

Compute the future value (FV) of a present sum at a given interest rate.

Calculate periodic payment amount for a loan or annuity.

Compare leasing vs buying a car over the same period.

Calculate tip and per-person amount for a restaurant bill.

Convert hourly wage to monthly and annual salary, gross or net.

Calculate net worth and debt ratio from assets and liabilities.

Compute time and monthly contribution needed to reach a savings target.

Compute the cost-per-use of a purchase to evaluate value.

Calculate due date and current gestational week from last period.

Compute recommended daily water intake in liters by weight, activity, climate.

Estimate optimal bedtime or wake time based on 90-min sleep cycles.

Compute healthy weight range based on BMI 18.5-24.9.

Calculate remaining caffeine in body after time elapsed.

Compute when to reapply sunscreen based on SPF, activity, and water exposure.

Compute money and health time saved by quitting smoking.

Calculate next period, fertile window, and ovulation date.

Estimate reading time for a text based on word count.

Generate a study schedule based on exam date and topics.

Calculate the grade needed on remaining exams to reach target average.

Compute student loan repayment schedule and total interest.

Compare net tuition cost across multiple scholarships and aid packages.

Compute % change between two values, signed (increase or decrease).

Simplify a ratio to lowest terms using GCD.

Add, subtract, multiply, or divide two fractions and return the simplified result.

Solve quadratic equation ax²+bx+c=0 with discriminant analysis.

Calculate linear regression slope and intercept from summary statistics.

Calculate cross exchange rate between two currencies via USD.

Convert shoe size between EU, US (M/W) and UK systems.

Convert clothing size between EU, US and UK systems.

Convert recipe quantities between cups, ml, grams, oz, tbsp, tsp.

Convert a time between two UTC offsets accounting for date rollover.

Convert a number between bases 2 (binary), 8 (octal), 10 (decimal), and 16 (hex).

Convert between Roman numerals and decimal (1-3999).

Calculate file transfer time at a given connection speed.

Get dimensions (mm, in) of standard paper formats (A0-A10, B0-B10, US Letter, Legal, Tabloid).

Convert AWG wire gauge to diameter (mm) and resistance (ohms/m).

Convert power values between W, kW, HP, BTU/h, cal/s.

Convert pressure between Pa, kPa, MPa, bar, psi, atm, mmHg, mbar, torr.

Convert angles between degrees, radians, gradians and turns.

Convert flow rate between L/s, L/min, L/h, m³/h, gpm, cfm.

Convert density between kg/m³, g/cm³, lb/ft³, and lb/gal.

Calculate great-circle distance between two coordinates.

Check if passport is valid for travel (6-month rule).

Calculate the margin charged on a currency exchange.

Compute the time difference (hours) between two timezones.

Compute optimal vacation usage by chaining bridge days with public holidays.

Estimate travel insurance cost based on trip cost, age, duration, destination.

Adjust baking recipe for high altitude (less leavening, more liquid, higher temp).

Compute daily food portion (g) for dogs and cats by weight, age, activity.

Compute dog due date from mating date (gestation 63 days).

Compute cat due date from mating date (gestation 63-67 days).

Estimate horse weight using Carroll formula from heart girth and body length.

Compute aquarium heater wattage needed by tank volume and target temp.

Generate upcoming vaccination schedule for a puppy or kitten.

Compute fabric meters needed for a garment by pattern.

Convert ring sizes between EU, US, UK, and Japan systems.

Convert bra size between FR, US, UK and EU systems.

Compute fabric meters needed for curtains, including hems and pattern repeat.

Estimate dress alteration cost and time by alteration type.

Calculate star distance from apparent and absolute magnitude.

Compute telescope magnification, exit pupil, and field of view.

Compute your weight on other planets using gravity ratios.

Convert astronomical distances between light-years, parsecs, AU, km.

Calculate energy released by an earthquake from its magnitude.

Compute oven cooking time for meat by cut, weight, and doneness.

Calculate dry pasta, water and salt for a given number of people.

Compute baker's hydration % = water/flour×100.

Estimate thawing time for frozen food by weight and method.

Compute solar panel return on investment over their lifetime.

Compute electric vehicle charging cost and time to full.

Compute heat pump Coefficient of Performance (COP).

Compute annual electricity cost of a household appliance.

Compute energy and money saved by switching from incandescent/halogen to LED.

Compute required sample size for a survey to hit a target margin of error.

Compute z-score (standardized score) and percentile from a value, mean, and standard deviation.

Compute confidence interval for a sample mean.

Compute the percentile rank of a value within a dataset.

Compute startup monthly burn rate and runway.

Compute Customer Acquisition Cost vs Lifetime Value ratio.

Compute customer or revenue churn rate over a period.

Convert between markup and margin (often confused).

Compute the effective discount when stacking multiple promotions.

Compute projectile trajectory: range, max height, time of flight.

Compute simple pendulum period T=2π√(L/g).

Compute kinetic energy KE=½·m·v².

Compute wave frequency, wavelength, or period from any two.

Compute buoyancy force, displaced volume, or floating analysis (Archimedes).

Compute lab solution dilution C1·V1=C2·V2.

Compute triangle area from three side lengths using Heron's formula.

Compute sphere volume V=(4/3)πr³ and surface area A=4πr².

Compute cone volume V=(1/3)πr²h and lateral/total surface area.

Compute area, perimeter, and apothem of a regular n-gon.

Compute Euclidean distance between two 2D points.

Convert shoe size between EU, US, UK, and Japanese systems.

Detect the hidden margin charged by a money exchanger over the mid-market rate.

Convert dog age to human-equivalent years using modern AAHA method.

Convert cat age to human-equivalent years (15+9+4×).

Compute French overtime pay (heures supplémentaires) per labor code.

Compute French paid vacation days earned (congés payés).

Compute total employer cost in France (gross + social charges).

Compute fully-loaded hourly cost-to-company.

Compute French maternity leave duration and IJSS allowance.

Compute paint quantity for walls including coats and waste margin.

Compute grout quantity for a tiling job.

Compute wallpaper rolls for a room including pattern repeat and waste.

Compute grass seed quantity (kg) for a lawn area at recommended seeding rate.

Compute chlorine dosage (g) for pool maintenance based on volume and target ppm.

Compute gear ratio and torque/speed multiplication.

Compute spring constant k from Hooke's law F=k·x.

Compute hydraulic system pressure P=F/A.

Compute motor torque from power and RPM.

Compute pump power requirement.

Compute volumetric (dimensional) weight for shipping.

Compute Economic Order Quantity (Wilson formula).

Reverse-VAT: extract the VAT and net price from a TTC amount.

Compute inventory turnover ratio = COGS / avg inventory.

Compute ellipse area A=π·a·b and approximate perimeter (Ramanujan).

Compute Euclidean distance between two 3D points.

Compute cylinder volume V=πr²h and surface area A=2πr(r+h).

Compute pyramid volume V=(1/3)·base_area·height.

Compute torus volume V=2π²Rr² and surface area.

Convert between light-years and km/miles.

Scale recipe quantities to a new servings count.

Compute meat cooking time and target internal temperature by cut and doneness.

Compute remaining caffeine in body over time using 5-hour half-life.

Compute dew point temperature using Magnus formula.

Estimate sunrise/sunset times for a latitude on a given day of year.

Compute lime or sulfur amount to shift soil pH to a target.