Geometry Calculators
Geometry calculators for triangles, areas, perimeters and angles — each with the formula and a step-by-step solution.
2 calculators in this category
- Triangle CalculatorEnter the three side lengths to find the area (via Heron’s formula), the perimeter, the semi-perimeter and the triangle type. The calculator also checks that the sides form a valid triangle.Open calculator→
- Pythagorean Theorem CalculatorUse the Pythagorean theorem (a² + b² = c²) to find a missing side of a right triangle. Find the hypotenuse from the two legs, or find a leg from the hypotenuse and the other leg.Open calculator→
About geometry calculators
Every calculator on CalcSolver runs entirely in your browser, so your numbers stay on your device and results appear instantly. Each tool shows the formula it uses and a clear, step-by-step solution, making it useful for checking homework, double-checking your own working, or learning a method for the first time.
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