📐 Math & Statistics Calculators
Eleven tools for the arithmetic that comes up in homework, invoices and lab reports, from a quick percentage to population versus sample standard deviation.
Percentage Calculator
Four tools for every kind of percentage question.
➗Fraction Calculator
Add, subtract, multiply and simplify fractions, with steps.
⚖Ratio Calculator
Solve proportions, simplify ratios and scale recipes.
📐Triangle Calculator
Sides, angles, area and hypotenuse from what you know.
📊Standard Deviation Calculator
Mean, variance and both standard deviations, with working.
🔬Scientific Calculator
Trigonometry, logs, powers, memory, history and keyboard input.
📊Average Calculator
Mean, median, mode and range from one paste.
📐Quadratic Formula Calculator
Roots, discriminant and vertex, with the steps.
🎲Probability Calculator
Two events: both, either, neither, exactly one.
📏Area Calculator
Nine shapes, metric and imperial, formula shown.
📦Volume Calculator
Eight solids, in cubic units, litres and gallons.
About these 11 math & stats tools
Six tools for the arithmetic that keeps coming up: percentages on an invoice, fractions in a recipe, a ratio on a drawing, a triangle on a site plan, a standard deviation in a lab report.
Where it helps, each one shows the steps rather than just the answer, so you can check the method as well as the result, or copy the working into homework.