Tooloo Math and Calculation
Math and Calculation Tools
Calculators for percentages, ratios, fractions, BMI, discounts, business formulas, and random numbers.
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Find the right calculator
Every calculation scenario has its own page with formulas, limits, and answers to common questions.
Fast and private：Calculations run in your browser. Tooloo does not store your numbers or calculation input.
Calculator library
All calculators
Percentage ToolsCalculate percentages and percentage changes on one page.→Statistics ToolsCalculate averages, medians, and percentiles.→Ratio ToolsCalculate ratios and scales on one page.→Fraction CalculatorCalculate two fractions with exact integer arithmetic.→Body CalculatorsCalculate BMI and BMR on one page for reference only.→Price ToolsCalculate discounts, original prices, and tax-inclusive amounts.→Business CalculatorsCalculate margin and markup on one page.→Random Number GeneratorGenerate random integers within a range in your browser.→