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Geometry calculators
Explore 7 free geometry calculators. Calculate in your browser with clear inputs, worked examples, and transparent methods.
7 calculators available
- Area Calculator
Calculate area and perimeter for rectangles, circles, triangles, trapezoids, and ellipses.
- Circle Calculator
Find diameter, circumference, area, and equations from a circle radius.
- Pythagorean Theorem Calculator
Find the hypotenuse and other properties of a right triangle from its two legs.
- Right Triangle Calculator
Solve all sides, acute angles, area, and perimeter from two right-triangle legs.
- Surface Area Calculator
Calculate total and lateral surface area for common solid shapes.
- Triangle Calculator
Solve a triangle from three side lengths, including area, perimeter, angles, and classification.
- Volume Calculator
Find the volume and surface area of common three-dimensional shapes.