All Free Tools

A clean online calculator for quick everyday math.

Find percentages, percent change, discounts, markups, and reverse percentages.

Simplify ratios, find equivalent ratios, and split totals by ratio parts.

Compare measured and accepted values with percent error, signed error, and steps.

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

Calculate powers with positive, negative, zero, decimal, and fraction exponents.

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

Calculate square roots, cube roots, nth roots, exponent form, and steps.

Solve ax^2 + bx + c = 0 with roots, discriminant, vertex, and steps.

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

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

A cute pastel calculator for quick everyday math.

A free scientific calculator for trig, logs, roots, powers, and constants.

Add, subtract, multiply, divide, simplify, and convert fractions.

Generate random numbers in a custom range, with unique, sorted, and copied results.