Free Online Calculators
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Calculators
1–12 / 73Percentage calculator
Calculate a percentage of a number.
Discount calculator
Calculate the final price and savings after a discount.
Loan calculator
Estimate fixed monthly payments and total interest.
Compound interest
Project a balance with annual compounding and no deposits.
Age calculator
Calculate completed years of age between two dates.
Date difference
Count elapsed days between two calendar dates.
Unit converter
Convert length, weight and temperature units.
Color converter
Convert a HEX color to RGB and HSL.
Fraction arithmetic
Add, subtract, multiply or divide exact rational numbers.
Ratio simplifier
Reduce a multi-part whole-number ratio to its lowest terms.
Missing proportion
Solve a / b = c / x for the missing fourth value.
Real quadratic solver
Solve ax² + bx + c = 0 and report real roots; supports the linear case.
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