AllEasyToolsLower secondary
Pythagorean theorem
Pythagorean theorem: formula, units and explained result. No account required. Processing stays in your browser.
h = √(a² + b²)
Right triangles only. Positive lengths.
How to use this calculator
- Identify the quantities and convert them to the units shown.
- Apply the formula first, then compare with the substitution and result.
- Check the assumptions and whether the order of magnitude makes sense.
Levels are approximate topic groupings, not a complete curriculum for every country. Numerical results are rounded and may lose precision for extreme or nearly singular inputs.
A practical example
Use these sample inputs to check the calculation before entering your own values.
- Leg a (m)
- 3
- Leg b (m)
- 4
Result for this example
- Hypotenuse
- 5 m