All Free Tools

A clean browser calculator for quick arithmetic, percent checks, and copied results.

Find percent-of answers, percent change, discounts, and original values with reverse percentages.

Simplify ratios, scale matching ratios, and split totals by ratio parts.

Compare your measured value with the accepted value, then see percent error and direction.

Calculate remaining amount, elapsed time, or half-life with decay steps.

Calculate powers, zero and negative exponents, simple fraction exponents, and scientific notation.

Calculate logarithms with custom bases, ln, log10, exponent checks, and change-of-base steps.

Calculate square roots, cube roots, nth roots, exponent form, real-number rules.

Solve quadratic equations with real or complex roots, discriminant, graph details, and steps.

Add, subtract, multiply, divide, and convert binary numbers.

Calculate hex arithmetic, AND, OR, XOR, and base conversions with decimal and binary checks.

A cute pastel calculator for quick everyday math.