MathVault

Geometry calculator

Area, volume and surface area of every common shape in one place, and dedicated solvers for triangles and circles.

40 cm²
A = l × w · l = 8, w = 5
in m²0.004
in ft²0.043055642
in in²6.2000124

Geometry solvers

Triangle calculatorAny triangle from SSS, SAS, ASA, AAS or SSA, with a drawing to scale.Pythagorean theoremHypotenuse or missing leg of a right triangle.Circle calculatorRadius, diameter, circumference and area from any one.Area calculatorNine flat shapes with formulas.Volume calculatorEight solids, litres and gallons.Surface area calculatorPaint, wrap or sheet material.

Show me the steps

An AI tutor walks through the working for any problem you type. The answer above is computed in your browser; the explanation is optional and is the only thing that leaves your device.

Questions people ask

What can this geometry calculator do?

Area of 9 flat shapes, volume of 8 solids and surface area of 7 solids from one screen, plus dedicated solvers for triangles (any 3 values), right triangles (Pythagorean theorem) and circles.

Which units can I use?

Millimetres, centimetres, metres, inches, feet or yards. Results are shown in your unit and converted to other common units, including litres and gallons for volumes.

Are the formulas shown?

Yes. Every result shows the formula used and the values substituted, and each page has a formula table you can copy into notes.