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Free Online Calculators: All Your Calculations Simplified

Discover our complete collection of free online calculators for all your daily needs: personal finance, real estate, health, taxation and more. All our 2026 calculators are updated with the latest official scales (taxes, social contributions, bank rates) and offer accurate instant results without registration.

19 free tools

Compound Interest Calculator

Online compound interest calculator — periodic contributions, inflation, taxation, chart and annual table, rate comparison

Online Timer

Online timer with Pomodoro, multi-timers and sound alarm — free and no sign-up

Age Calculator

Calculate your exact age to the second, with zodiac sign, birthday countdown and life milestones

Retirement Calculator 2026

Calculate your retirement age, quarters, and 2026 pension. Reform integrated, general scheme + Agirc-Arrco. Free personalized simulations.

Notary Fees Calculator 2026

Calculate precisely notary fees for your 2026 real estate purchase. Transfer duties, fees, disbursements detailed. Old vs new property, by department.

Tax Calculator 2026

Calculate your 2026 income tax (2025 income). Progressive scale, family quotient, tax reduction, tax credits and withholding tax rate.

Consumer Loan Calculator 2026

Calculate your consumer loan with monthly payments, APR, total cost and amortization schedule. Auto, home improvement, personal loans.

Calorie & Macro Calculator 2026

Calculate your caloric needs (BMR, TDEE) and personalized macronutrients (protein, carbs, fats) according to your goal: loss, maintenance or mass gain.

Gross to Net Salary Calculator 2026

Calculate your net salary from gross (or reverse) with detailed social security contributions 2026. Free simulator for all employment statuses.

Date Difference Calculator

Calculate difference between two dates in years, months, days, hours. Age calculator and tool to add/subtract time

Popular

Work Hours Calculator

Calculate your daily, weekly and monthly work hours. Breaks, overtime and gross salary estimation

Popular

Online Calculator

Free online scientific calculator with trigonometric, logarithmic and exponential functions

Amazon FBA Calculator

Estimez vos frais Amazon FBA, marges et bénéfices nets selon le prix de vente, les coûts logistiques et les commissions

Calculateur de frais eBay

Calculez quickly les commissions eBay, frais de transaction et bénéfices réels sur vos ventes

Percentage Calculator

Calculez easily vos pourcentages et variations

BMI Calculator

Calculez votre indice de masse corporelle

VAT Calculator

Calculate VAT net↔gross in real time. Rates by country (30+ countries), batch mode, French rate table by category, 7 currencies and CSV export.

Popular

Mortgage Calculator 2026

Calculate your mortgage monthly payments, total cost, interest and APR. Detailed amortization table and borrowing capacity calculator included.

Calculateur ROI publicité

Calculez le retour sur investissement de vos campagnes publicitaires et analysez easily votre rentabilité marketing.

Why Use Our Free Online Calculators?

Online calculators save you valuable time on complex calculations that would otherwise require Excel spreadsheets or advanced mathematical formulas. Our collection of free 2026 calculators covers all essential areas of daily life.

Financial Calculators

Our professional financial calculators help you make informed decisions: gross/net salary calculator with updated 2026 rates, mortgage simulator with complete amortization table, income tax calculator with 2026 progressive scale, consumer credit simulator, notary fees calculator for property purchase.

Health & Wellness Calculators

Optimize your health with our specialized calculators: calorie and macronutrient calculator (protein, carbs, fats), BMI (Body Mass Index) calculation with WHO interpretation, daily energy expenditure estimation.

Real Estate Calculators

For your real estate projects: mortgage simulator with borrowing capacity, rental profitability calculator (gross and net yield), 2026 notary fees (old and new), Pinel law simulator with tax reduction.

Security and Privacy

All our secure calculators work with 100% local processing in your browser. Your sensitive data (amounts, income, personal information) is NEVER sent to our servers. Calculation is done entirely on your device via JavaScript, ensuring total confidentiality.

Frequently Asked Questions

Yes, all our 2026 calculators are updated with the latest official scales: income tax brackets (2026 finance law), URSSAF social contribution rates, 2026 Social Security ceiling ($46,368/year), notary fee scale, usury rates for loans. Our teams update data as soon as officially published.

No, absolutely not. All calculations are performed locally in your browser (client-side JavaScript processing). Your salary amounts, income, loans or any other personal data are NEVER sent to our servers or stored. You can even use the calculators offline once the page is loaded. This approach ensures total GDPR-compliant confidentiality.

Yes, our calculators use the exact official formulas and the same algorithms as professional software. For example, the mortgage calculator uses the standard mathematical formula: Monthly payment = Principal × (Monthly rate) / (1 - (1 + Monthly rate)^-Number of months). The tax calculator applies the official progressive scale voted by Parliament. However, for complex situations (exceptional income, multiple tax breaks), we recommend consulting an accountant or financial advisor.

Yes, all our responsive calculators are optimized for all devices: smartphones (iPhone, Android), tablets (iPad, Samsung Tab) and computers (Windows, Mac, Linux). The interface automatically adapts to your screen size. Buttons and input fields are sized for comfortable touch use. You can therefore perform your calculations anywhere, even on the go.

No, no limits. You can use all our unlimited free calculators as many times as needed, 24/7, without registration or account creation. Need to compare 50 different loan simulations? Calculate your net salary for 100 scenarios? No problem. Unlike freemium tools that limit to 3-5 calculations/day, ToolSmartly offers completely free access.

Can't find the tool you need?

We regularly add new free tools. Feel free to suggest a tool.

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Last updated: March 12, 2026
Created on: January 15, 2024