Free Online Calculators

Math Calculators — Arithmetic, algebra, geometry, fractions and number theory.

Percentage & Everyday Calculators — Discounts, tips, taxes and the quick sums you need daily.

Finance Calculators — Loans, EMI, interest, savings, salary and retirement planning.

Investment Calculators — Returns, compounding, portfolios, bonds and asset allocation.

Stock Market Calculators — Share profit, averaging, dividends and capital gains.

Trading Calculators — Position sizing, risk/reward, leverage, expectancy and drawdown.

Forex Calculators — Pip value, lot size, margin, spread cost and swap.

Cryptocurrency Calculators — Spot and futures P&L, liquidation, staking, DCA and fees.

Tax Calculators — Income tax, GST, VAT, capital gains and payroll deductions.

Real Estate Calculators — Rental yield, cap rate, affordability, stamp duty and flips.

Date & Time Calculators — Age, date differences, business days, timesheets and timestamps.

Health & Fitness Calculators — BMI, BMR, TDEE, macros, body fat, pace and training zones.

Unit Converters Calculators — Length, weight, volume, temperature, data, energy and more.

Construction & Home Calculators — Concrete, tile, paint, roofing, lumber and material estimates.

Electrical Calculators — Ohm's law, power, wire size, voltage drop and battery runtime.

Energy & Solar Calculators — Solar sizing, payback, battery backup and electricity bills.

Science Calculators — Physics and chemistry: force, energy, molarity, pH and gas laws.

Statistics & Data Calculators — Descriptives, distributions, regression, tests and sample size.

Education Calculators — GPA, grades, attendance, study time and reading speed.

Business Calculators — Margins, break-even, SaaS metrics, CAC, LTV, burn and runway.

Automotive & Transport Calculators — Fuel cost, mileage, EV charging, tyre size and trip planning.

Programming & Tech Calculators — Number bases, bitwise ops, hashes, bandwidth and storage.

Cooking & Food Calculators — Recipe scaling, baker percentages, oven temps and portions.

Agriculture Calculators — Seed rate, fertiliser, irrigation, yield and livestock feed.

Engineering Calculators — Beams, stress, gears, pumps, flow, tolerance and thermal loads.

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