Math Calculators

Calculate percentages, percentage of a number, and simple percentage values.

Calculate the average of a list of numbers quickly.

Calculate percentage increase or decrease between two values.

Convert a fraction into a percentage.

Simplify a ratio between two numbers.

Solve a simple proportion in the form a:b = c:x.

Calculate the square root of a number.

Calculate a number raised to a power.

Round a number to a selected number of decimal places.

Calculate percentage error between an observed value and accepted value.