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Maths tools

Maths Calculators

Solve common arithmetic, algebra, geometry and statistics tasks quickly, with enough working to help users understand the result.

13 calculators5 guides

Maths calculators are best when they reduce friction without hiding the method. Whether you are checking a percentage, ratio, average or probability, the base value and order of operations matter.

Use these tools to confirm the result, then scan the notes for the formula and common mistakes. That makes the answer easier to explain, reuse and sense-check.

13 calculators

Choose a quick solver for everyday maths, schoolwork, statistics, geometry and number checks.

MathsPercentageCalculate percentages, percentage change and reverse percentages for discounts, marks and comparisons.MathsScientificEvaluate arithmetic, powers, roots and common trigonometric functions in a clean browser calculator.MathsFractionsAdd, subtract, multiply or divide two fractions and reduce the result.MathsRatioSimplify a ratio, compare parts and scale a ratio to a chosen total for recipes, mixtures, maths problems and planning.MathsQuadraticSolve ax squared plus bx plus c equals zero and show the discriminant.MathsStandard DeviationCalculate mean, variance and standard deviation from a list of numbers.MathsWeighted AverageCalculate a weighted average from values and weights such as credits, quantities or percentage shares.MathsProbabilityCalculate single-event probability, odds and the chance of at least one success across repeated trials.MathsAreaCalculate the area of a rectangle, triangle, circle or trapezium for maths, rooms, gardens and material estimates.MathsVolumeCalculate volume for a cuboid, cylinder, sphere or cone, with clear units for maths, science and project estimates.MathsPrime FactorsBreak a whole number into its prime factors, with factor pairs and a clear result for checking maths work.MathsRandom NumberGenerate repeatable random-style whole numbers from a range and seed for simple draws, tests and classroom examples.MathsGPACalculate a weighted grade point average from course credits and grades on a common 4.0 scale.

Guides

Useful reading for maths questions

Read the background, then move straight into the linked calculators when you need a result.