Calculator category

Math

Explore 15 free math calculators. Every tool works locally and requires no sign-up.

Calculate percentages, percent change, and reverse percentages instantly with this free online tool.

Add, subtract, multiply, and divide fractions with step-by-step simplified results.

Calculate the percentage increase between two numbers.

Calculate the percentage decrease between two numbers.

Find the mean, median, mode, and range of any set of numbers.

Simplify ratios and solve for missing values in equivalent ratios.

Solve proportions and find the missing value in a/b = c/d.

Convert any decimal, including repeating decimals, into a simplified fraction.

Convert fractions and mixed numbers into decimals.

Solve for any side of a right triangle using a² + b² = c².

Calculate square footage of rooms and areas in any shape, with cost per square foot.

Find the area of rectangles, circles, triangles, trapezoids, and more.

Calculate the volume of cubes, cylinders, spheres, cones, and boxes.

Full-featured online scientific calculator with trig, log, exponent, and memory functions.

Add or subtract hours, minutes, and seconds between two times.