What is the Pythagorean Theorem Calculator?
Find the hypotenuse of a right triangle from its two legs. From percentages and fractions to logarithms and quadratic equations, these math calculators show exact results — using arbitrary-precision integers wherever whole-number answers can get very large.
How to use the Pythagorean Theorem Calculator
- Enter your leg a, your leg b.
- Results update automatically as you type; you can also press Calculate.
- Read the output: hypotenuse c, area, angle opposite a.
- Use the 📊 chart to see the result visually, then copy or share it.
Formula and method
Worked example
With leg a = 3, leg b = 4, the Pythagorean Theorem Calculator returns hypotenuse c: 5; area: 6; angle opposite a: 36.8699°.
Tips for better results
- Use the formula section on each page to check your homework method, not just the answer.
- For very large factorials, combinations and base conversions we use exact big-integer math.
- Floating-point results are rounded to 12 significant digits to remove binary noise.
Frequently asked questions
What does the Pythagorean Theorem Calculator do?
Find the hypotenuse of a right triangle from its two legs.
How is it calculated?
The Pythagorean Theorem Calculator uses this method: c = √(a² + b²).
Can you show an example?
With leg a = 3, leg b = 4, the Pythagorean Theorem Calculator returns hypotenuse c: 5; area: 6; angle opposite a: 36.8699°.
Is the Pythagorean Theorem Calculator accurate?
Yes. It uses standard formulas and exact constants, and the results are verified by our automated test suite. Values are displayed to up to 12 significant digits.
Is this tool free and private?
Yes — the Pythagorean Theorem Calculator is completely free with no sign-up, and it runs entirely in your browser, so the values you enter are never uploaded to our servers.
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