Calculator category

Math calculators

Solve common number questions quickly with clear working and examples.

11 working calculators

Clear formulas · Useful comparisons · No sign-up

Percentage Calculator

Solve five common percentage questions, including percentage change, increase and decrease.

Calculate the percentage increase or decrease between an original value and a new value.

Calculate an arithmetic average or add matching weights for a weighted average and breakdown.

Add, subtract, multiply or divide fractions and display the reduced, mixed-number and decimal results.

Simplify a ratio and solve the missing value in an equivalent proportion.

Calculate mean, median, mode and range from one comma-separated data set.

Calculate population or sample standard deviation, variance, mean and a value-by-value breakdown.

Calculate volume and surface area for cubes, rectangular prisms, cylinders, spheres and cones.

Evaluate arithmetic, powers, roots, logarithms and trigonometric functions with a safe expression parser.

Calculate triangle area, perimeter and three angles from three valid side lengths.

Calculate simple probability, combinations or permutations from total and selected outcomes.