Math & Geometry Calculators

Tools for everyday math and geometry problems.

Solve the three classic percentage questions: what is X% of Y, X is what percent of Y, and the percentage increase or decrease between two numbers.

Percentage increase and decrease with negative values handled correctly, percent vs. percentage points, and multi-period trends.

Calculate the area of a rectangle, square, triangle, circle, trapezoid, parallelogram, or ellipse in any unit.

Find out how many tiles and boxes you need for any room.

Calculate total square footage, boxes, and cost across multiple rooms in one project.