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Every finance calculator you need: loans, mortgages, investments, tax, retirement, and more. Free, accurate, and mobile-friendly.

Comprehensive math calculators for algebra, geometry, statistics, fractions, number theory, and more. Free with step-by-step solutions.

BMI, TDEE, body fat, calories, heart rate, pregnancy, and 100+ more free health calculators. Science-backed formulas.

Science calculators for chemistry (molar mass, pH, ideal gas), physics (kinetic energy, waves, optics), and biology (genetics, population).

Convert between any units: length, weight, temperature, volume, speed, area, pressure, and more. Instant conversions with formulas.

Free crypto calculators: staking rewards, gas fees, mining profitability, profit/loss, tax estimation, and DeFi yield calculations.