MaCalculatriceEnLigne

Generate a full 1RM-to-12RM repetition table from a known lift using Epley formula. Returns: {input_weight, input_reps, estimated_1rm}. See list_bundles for related 'sport' calculators.

Add two time durations and return the total in hours and minutes. See list_bundles for related 'temps-rh' calculators.

Calculate exact age in years, months and days from a birth date. Returns: {today, age_years, age_months, age_days, total_days_lived, days_to_next_birthday}. See list_bundles for related 'temps-rh' calculators.

Calculate exact age in multiple units from birth date. Returns: {weeks, hours, minutes, seconds}. See list_bundles for related 'fun' calculators.

Compute alcohol units (UK) and grams of pure alcohol in a drink. Use for health tracking and limit awareness. Inputs: volume mL, ABV %. Returns UK units, grams of pure alcohol, and standard-drink equivalent. See list_bundles for related 'cuisine' calculators.

Assess altitude sickness risk and recommend acclimatization schedule. Returns: {risk_level, risk_color, recommended_acclimatization_days, symptoms_to_watch, recommendations}. See list_bundles for related 'voyage' calculators.

Convert angles between degrees, radians, gradians and turns. Returns: {original}. See list_bundles for related 'conversions' calculators.

Calculate periodic payment amount for a loan or annuity. Returns: {monthly_payment_eur, total_paid_eur, total_interest_eur}. See list_bundles for related 'finance-universal' calculators.

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

Compute aquarium water volume in L and US gallons. Use for fishkeeping, dosing, and stocking decisions. Inputs: shape (rectangular/cylindrical/bow-front), L×W×H or radius×height in cm. Returns liters and gallons. See list_bundles for related 'animaux' calculators.

Compute area for common 2D shapes (rectangle, triangle, circle, trapezoid, etc.). Use for geometry, real estate, or paint estimates. Inputs: shape + dimensions. Returns area in input-units squared. See list_bundles for related 'math' calculators.

Calculate French auto-entrepreneur (micro-enterprise) net income and social charges. Returns: {social_charges_rate_pct, social_charges, abatement_fiscal_pct, taxable_income_approx, net_before_tax, cfe_estimate_eur}. See list_bundles for related 'finance-france' calculators.

Compute simple, weighted, geometric, or harmonic mean. Use for grade averages, returns, or rates. Inputs: values list, optional weights, mode. Returns mean and detail. See list_bundles for related 'math' calculators.

Estimate French Baccalauréat final score from grades and coefficients. Use to track lycée results before official scores. Inputs: grades by subject with coefficients. Returns weighted average and mention. See list_bundles for related 'education' calculators.

Adjust baking recipe for high altitude (less leavening, more liquid, higher temp). Use for mountain cooking. Inputs: altitude m, ingredients. Returns adjusted recipe. See list_bundles for related 'cuisine' calculators.

Convert baking measurements between cups, tablespoons, grams, and milliliters for common ingredients. Use for translating recipes across regions. Inputs: ingredient, value, from-unit, to-unit. Returns converted quantity. See list_bundles for related 'cuisine' calculators.

Convert numbers between bases (binary, octal, decimal, hexadecimal, any base 2-36). Returns: {input, decimal_value, result}. See list_bundles for related 'math' calculators.

Calculate max bending moment and shear for a beam under uniform distributed load. Returns: {load_kN_per_m, max_moment_kNm, max_shear_kN, note}. See list_bundles for related 'construction' calculators.

Calculate Belgian benefit-in-kind for company car (avantage de toute nature voiture). Returns: {co2_reference, benefit_rate_pct, annual_taxable_benefit, monthly_taxable_benefit, estimated_monthly_tax_impact}. See list_bundles for related 'finance-belgique' calculators.

Compute Belgian donation tax (droits de donation) by region (Bruxelles/Flandre/Wallonie). Use for estate planning in Belgium. Inputs: region, amount, recipient relation. Returns tax due and effective rate. See list_bundles for related 'finance-belgique' calculators.

Calculate Belgian personal income tax (IPP/PB) on an annual taxable base using the income-year 2026 (tax year 2027) progressive brackets, minus the tax-free allowance reduction (SPF method). Returns: {income, tax_free_amount, tax_free_reduction, taxable_base, income_tax, effective_rate_pct, marginal_rate_pct, ...}. See list_bundles for related 'finance-belgique' calculators.

Estimate Belgian retirement pension based on career years and average salary. Use for retirement planning in Belgium. Inputs: years of contribution, average salary, status (employee/self-employed). Returns monthly pension estimate. See list_bundles for related 'finance-belgique' calculators.

Convert Belgian gross monthly salary to net salary (estimate: employee ONSS 13.07% + annual personal income tax, single, no municipal surcharge; same engine as /api/v1/salaire-net?pays=be). Returns: {gross_monthly, social_cotisations_13_07pct, special_social_contribution, professional_withholding_tax, net_monthly, net_annual, ...}. See list_bundles for related 'finance-belgique' calculators.

Calculate Belgian self-employed social contributions (cotisations INASTI). Returns: {annual_income, tier1_up_to_73850_at_20_5pct, tier2_73850_to_108785_at_14_16pct, tier3_above_108785, total_contributions, effective_rate_pct}. See list_bundles for related 'finance-belgique' calculators.

Calculate Belgian VAT — convert between HT and TTC. Returns: {amount_ht, amount_ttc, vat_amount, vat_rate}. See list_bundles for related 'finance-belgique' calculators.

Compute physical, emotional, and intellectual biorhythm cycles for a date based on birth date. Use for self-tracking enthusiasts (pseudoscience). Inputs: birth date, target date. Returns 3 cycle values (-100 to +100) and zone. See list_bundles for related 'fun' calculators.

Estimate blood alcohol content (BAC) using Widmark formula. Returns: {bac_percent, legal_status_fr, estimated_sober_in_hours}. See list_bundles for related 'sante' calculators.

Calculate Body Mass Index (BMI) and weight category. See list_bundles for related 'sante' calculators.

Calculate Basal Metabolic Rate using Mifflin-St Jeor equation. Returns: {bmr_kcal}. See list_bundles for related 'sante' calculators.

Estimate body fat percentage from BMI, age and sex using Deurenberg equation. Returns: {body_fat_pct}. See list_bundles for related 'sante' calculators.

Calculate body fat percentage using the US Navy circumference method. See list_bundles for related 'sante' calculators.

Convert BPM tempo to millisecond delay times for different note values. See list_bundles for related 'musique' calculators.

Calculate bra size in FR, US or UK system from underbust and bust measurements (cm). Returns: {band_size, size, cup_diff_cm}. See list_bundles for related 'textile-mode' calculators.

Convert bra size between FR, US, UK and EU systems. Returns: {FR, US, UK, EU}. See list_bundles for related 'textile-mode' calculators.

Compute reaction + braking distance by road condition (dry/wet/icy). Use for driver safety education. Inputs: speed km/h, reaction time s, road type. Returns total stopping distance m. See list_bundles for related 'auto-transport' calculators.

Compute cycling gear ratio (braquet) and development per pedal turn. Use for road cycling gear analysis. Inputs: chainring teeth, sprocket teeth, wheel diameter mm. Returns ratio and meters per pedal turn. See list_bundles for related 'sport' calculators.

Compute baker's hydration % = water/flour×100. Use for bread recipe analysis. Inputs: flour g, water g. Returns hydration % and dough type (firm/standard/wet). See list_bundles for related 'cuisine' calculators.

Compute break-even point in units and revenue. Use for business plans and pricing decisions. Inputs: fixed costs, price/unit, variable cost/unit. Returns break-even units and revenue. See list_bundles for related 'finance-universal' calculators.

Compute due date for animal breeding given mating date and species gestation period. Use for breeders. Inputs: species (dog/cat/horse/rabbit/cow), mating date. Returns due date and gestation milestones. See list_bundles for related 'animaux' calculators.

Estimate French Brevet (DNB) score from grades and continuous-control marks. Use for collège students forecasting their result. Inputs: grades by subject, continuous control. Returns total points and mention. See list_bundles for related 'education' calculators.

Compute bricks or blocks needed for a wall including waste margin. Use for masonry projects. Inputs: wall dimensions, brick size, waste %. Returns brick count and pallets. See list_bundles for related 'construction' calculators.

Compute buoyancy force, displaced volume, or floating analysis (Archimedes). Use for physics or shipping. Inputs: object mass/volume, fluid density. Returns buoyant force and float/sink verdict. See list_bundles for related 'science' calculators.

Compute startup monthly burn rate and runway. Use for fundraising or expense control. Inputs: cash on hand, monthly expenses, monthly revenue. Returns burn, runway in months, profitability date. See list_bundles for related 'finance-universal' calculators.

Compute electrical cable cross-section (mm²) per NF C 15-100. Use for residential wiring. Inputs: power kW, voltage, length, max voltage drop %. Returns required section. See list_bundles for related 'construction' calculators.

Calculate cable section from power, voltage, distance and max voltage drop. Returns: {current_a, allowed_drop_v, calculated_section_mm2, recommended_mm2}. See list_bundles for related 'science' calculators.

Compute Customer Acquisition Cost vs Lifetime Value ratio. Use for SaaS unit economics analysis (target ≥3.0). Inputs: total CAC, LTV. Returns ratio and health verdict. See list_bundles for related 'finance-universal' calculators.

Compute remaining caffeine in body over time using 5-hour half-life. Use for sleep planning. Inputs: caffeine mg, time since intake. Returns remaining mg and clearance forecast. See list_bundles for related 'sante' calculators.

Calculate remaining caffeine in body after time elapsed. Returns: {hours_to_below_25mg, safe_to_sleep}. See list_bundles for related 'sante' calculators.

Track caffeine intake against the safe daily limit (400 mg adult). Use for monitoring coffee/tea/soda consumption. Inputs: list of drinks (type, quantity). Returns total mg, % of limit, time-of-day distribution. See list_bundles for related 'cuisine' calculators.

Estimate calories burned during physical activity using MET values. Returns: {calories_burned}. See list_bundles for related 'sante' calculators.

Calculate combined Quebec + federal income tax on an employment income with the Quebec federal abatement (16.5%), single, no dependents (same engine as /api/v1/salaire-net?pays=qc). Returns: {income_cad, quebec_provincial_tax, federal_gross_tax, federal_abatement_qc, federal_net_tax, total_combined_tax, ...}. See list_bundles for related 'finance-afrique-quebec' calculators.

Calculate Canadian Employment Insurance (EI) premiums for Quebec and non-Quebec residents. Returns: {gross_annual_cad, max_insurable_earnings, insurable_earnings, employee_rate_pct, employee_premium}. See list_bundles for related 'finance-afrique-quebec' calculators.

Calculate Canadian federal income tax (CRA) with the basic personal amount credited at the lowest rate (before any Quebec abatement). Returns: {income_cad, basic_personal_amount, basic_personal_credit, taxable_income, federal_tax, effective_rate_pct, marginal_rate_pct, ...}. See list_bundles for related 'finance-afrique-quebec' calculators.

Calculate Quebec Pension Plan (RRQ) contributions for employee. Returns: {gross_annual_cad, rrq_base_earnings, rrq_contribution_tier1, rrq_additional_earnings, rrq_contribution_tier2, total_rrq_contribution, ...}. See list_bundles for related 'finance-afrique-quebec' calculators.

Compute French property capital gains tax (plus-value immobilière) including duration abatements. Use for sellers of secondary residence. Inputs: purchase price, sale price, years held, work cost. Returns tax due, social charges, net gain. See list_bundles for related 'finance-france' calculators.

Calculate car residual value: Y1:-25%, Y2:-15%, Y3:-10%, Y4-5:-8%, Y6+:-5%. Returns: {residual_value, total_dep, pct_lost}. See list_bundles for related 'auto-transport' calculators.

Compare leasing vs buying a car over the same period. Use for automotive purchase decisions. Inputs: car price, lease monthly cost, loan rate, ownership years. Returns total costs and recommendation. See list_bundles for related 'finance-universal' calculators.

Estimate annual personal carbon footprint (tCO₂e). Use for sustainability awareness. Inputs: housing, transport, diet, lifestyle. Returns total emissions and breakdown. See list_bundles for related 'vie-quotidienne' calculators.

Estimate CO2 sequestration by trees over their lifetime. Returns: {age_factor, annual_kg_co2_per_tree, annual_kg_co2_total, lifetime_kg_co2, lifetime_tonnes_co2, equivalent_cars_off_road_1yr}. See list_bundles for related 'astronomie-nature' calculators.

Calculate hypergeometric probability of drawing specific cards from a deck. Returns: {odds_one_in}. See list_bundles for related 'jeux-probabilites' calculators.

Compute flooring cost including waste margin. Use for renovation budget. Inputs: surface m², product price/m², waste %. Returns total cost and m² to order. See list_bundles for related 'vie-quotidienne' calculators.

Convert cat age to human-equivalent years (15+9+4×). Use for feline health. Inputs: cat age years. Returns human-equivalent age and life stage. See list_bundles for related 'animaux' calculators.

Calculate daily cat food quantity based on weight, age and lifestyle. Returns: {kcal_per_day}. See list_bundles for related 'animaux' calculators.

Compute cat due date from mating date (gestation 63-67 days). Use for breeders. Inputs: mating date. Returns due date window and milestones. See list_bundles for related 'animaux' calculators.

Calculate Belgian meal voucher (cheque-repas / maaltijdcheque) benefit. Returns: {face_value_per_voucher, employer_contribution_per_voucher, employee_contribution_per_voucher, monthly_total_vouchers, monthly_employer_cost, monthly_employee_contribution, ...}. See list_bundles for related 'finance-belgique' calculators.

Estimate French child support (pension alimentaire) based on income, custody and number of children. Returns: {income, rate_pct, monthly_support, annual_support}. See list_bundles for related 'finance-france' calculators.

Determine Chinese zodiac animal and element from birth year. Returns: {full_sign}. See list_bundles for related 'fun' calculators.

Compute customer or revenue churn rate over a period. Use for SaaS retention analysis. Inputs: starting customers, churned, period length. Returns churn %, retention %, and annualized rate. See list_bundles for related 'finance-universal' calculators.

Convert clothing size between EU, US and UK systems. Returns: {original}. See list_bundles for related 'conversions' calculators.

Compute compost volume produced from kitchen and garden waste over a year. Use for compost bin sizing. Inputs: household size, garden size m². Returns L/year and recommended bin volume. See list_bundles for related 'jardinage' calculators.

Compute compound interest growth A=P(1+r/n)^(nt). Use for savings, retirement projections, investment forecasting. Returns final amount, total interest, and yearly breakdown. See list_bundles for related 'finance-universal' calculators.

Compute compound interest with monthly contributions (savings plan). Use for systematic savers. Inputs: initial amount, monthly contribution, annual rate %, years. Returns final value, total contributed, total interest. See list_bundles for related 'finance-universal' calculators.

Compute cement, sand, gravel, and water for a given concrete volume (NF DTU 21). Use for construction projects. Inputs: volume m³, mix ratio. Returns weights of each ingredient. See list_bundles for related 'construction' calculators.

Calculate concrete stair dimensions, volume and materials using Blondel's formula. See list_bundles for related 'construction' calculators.

Compute one owner's share of condominium charges from the budget and tantièmes. Use for syndic or owner verification. Inputs: total budget, tantièmes-owned, total tantièmes. Returns annual and monthly share. See list_bundles for related 'immobilier' calculators.

Compute cone volume V=(1/3)πr²h and lateral/total surface area. Use for geometry or container design. Inputs: radius, height. Returns volume and areas. See list_bundles for related 'math' calculators.

Compute confidence interval for a sample mean. Use for statistics, A/B test results, or polling. Inputs: mean, std dev, sample size, confidence (90/95/99%). Returns CI lower/upper bounds. See list_bundles for related 'math' calculators.

Convert recipe quantities between cups, ml, grams, oz, tbsp, tsp. Use for international recipe translation. Inputs: value, from, to, ingredient (for density). Returns: {original}. See list_bundles for related 'conversions' calculators.

Estimate cooking time for meat, fish, or vegetables based on weight, method, and doneness. Use for kitchen planning. Inputs: food type, weight g, cooking method (oven/grill/sous-vide), doneness. Returns time min and target internal temp. See list_bundles for related 'cuisine' calculators.

Compute the cost-per-use of a purchase to evaluate value. Use for buying decisions on durable goods or subscriptions. Inputs: purchase price, expected uses or years. Returns cost per use and break-even use count. See list_bundles for related 'finance-universal' calculators.

Calculate unit cost price from raw materials, labor, and overhead. Returns: {total_cost}. See list_bundles for related 'finance-universal' calculators.

Calculate camera crop factor and equivalent focal length based on sensor width. See list_bundles for related 'photographie' calculators.

Compute crypto trading profit/loss including fees. Use for crypto investors tracking realized P&L. Inputs: buy price, sell price, quantity, buy fee, sell fee. Returns net P&L, ROI %, break-even price. See list_bundles for related 'crypto' calculators.

Calculate French flat tax (30% PFU) on cryptocurrency capital gains at withdrawal. Returns: {gain_ratio}. See list_bundles for related 'crypto' calculators.

Calculate cross exchange rate between two currencies via USD. Returns: {cross_rate_a_to_b, cross_rate_b_to_a}. See list_bundles for related 'conversions' calculators.

Calculate currency exchange with bank margin and show fees lost. Returns: {amount_source, from_rate_vs_usd, to_rate_vs_usd, mid_market_amount, amount_after_margin, fees_lost, ...}. See list_bundles for related 'voyage' calculators.

Compute fabric meters needed for curtains, including hems and pattern repeat. Use for sewing. Inputs: window dimensions, fullness, pattern repeat. Returns fabric length to buy. See list_bundles for related 'textile-mode' calculators.

Compute total curtain width using a fullness factor (1.5-3.0×). Use for window dressing. Inputs: window width m, fullness ratio. Returns total fabric width. See list_bundles for related 'vie-quotidienne' calculators.

Estimate cycling power output considering gradient, speed and total mass. Returns: {power_watts, watts_per_kg}. See list_bundles for related 'sport' calculators.

Compute cylinder volume V=πr²h and surface area A=2πr(r+h). Use for tanks, pipes, or containers. Inputs: radius, height. Returns volume and areas. See list_bundles for related 'math' calculators.

Calculate recommended daily protein intake based on weight and fitness goal. Returns: {rate_g_per_kg, daily_protein_g, calories_from_protein}. See list_bundles for related 'sante' calculators.

Check daily vitamin and mineral intake against RDA recommendations. Use for nutrition tracking. Inputs: list of foods with quantities. Returns % RDA per nutrient and deficiencies. See list_bundles for related 'cuisine' calculators.

Calculate file transfer time at a given connection speed. See list_bundles for related 'conversions' calculators.

Find the day of the week for any date (Zeller's congruence). Use for historical dates or birthday checks. Inputs: day, month, year. Returns weekday name. See list_bundles for related 'fun' calculators.

Calculate days, weeks, approximate months and working days between two dates. Returns: {weeks, months_approx, working_days}. See list_bundles for related 'temps-rh' calculators.

Calculate maximum loan capacity using French HCSF 35% debt ratio rule. Returns: {max_monthly_payment, max_loan, note}. See list_bundles for related 'immobilier' calculators.

Calculate debt-to-income ratio and maximum additional loan capacity. Returns: {ratio_pct, max_monthly_debt_35pct, max_additional_loan_payment, status}. See list_bundles for related 'immobilier' calculators.

Compute debt-to-income (DTI) ratio. Use for mortgage qualification or financial health checks. Inputs: monthly debt, monthly gross income. Returns DTI % and risk category. See list_bundles for related 'finance-universal' calculators.

Estimate shipping cost from weight, distance and service (standard vs express). Returns: {cost_eur, formula, note}. See list_bundles for related 'vie-quotidienne' calculators.

Compute density, mass, or volume given the other two. ρ=m/V. Use for materials, chemistry, fluid dynamics. Inputs: any 2 of (mass, volume, density). Returns the third. See list_bundles for related 'science' calculators.