📐 Math Tools

Free calculators for math — percentages, fractions, geometry, algebra, and everyday number crunching.

Enter radius, diameter, area, or circumference — instantly get all other circle measurements with step-by-step formulas

Calculate the volume of any cylinder — pipes, tanks, barrels, cans. Enter diameter and height, get volume in liters, gallons, cubic meters, and more.

Calculate any percentage — what is X% of Y, X is what % of Y, increase by %, discount, and percentage change between two numbers

Solve any triangle when you know two angles and a non-included side. Calculate all sides, the third angle, area, and more

Solve any triangle when you know two angles and the side between them. Calculate all sides, the third angle, area, and more

Solve any triangle when you know two sides and the included angle. Calculate the third side, remaining angles, area, and more

Solve the ambiguous case: two sides and a non-included angle. Find all possible triangles (0, 1, or 2 solutions) with step-by-step analysis

Solve any triangle when you know all three sides. Calculate angles, area, perimeter, heights, and see step-by-step solution with diagram