Math tools

Fractions, ratios, bases, algebra and percentages, with the working shown at every step. All calculations run in your browser.

• Percentage CalculatorHandle every common percentage question: what percent of, percent change, and reverse percentages.
• Fraction CalculatorFree fraction calculator that adds, subtracts, multiplies and divides fractions with whole numbers, and simplifies the answer to lowest terms.
• Scientific CalculatorFree online scientific calculator with sin, cos, tan, logarithms, roots, powers, factorials and degrees/radians mode. No signup, keyboard ready.
• Ratio CalculatorSimplify ratios, scale them up or down and solve proportion problems like A:B = C:D. Step-by-step working shown for cooking, maps and scale models.
• Number Base ConverterConvert between binary, decimal, hexadecimal, octal and any base from 2 to 36. Shows the positional working for each digit.

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