Pythagorean Theorem Calculator
Find any missing side of a right triangle using a² + b² = c² — enter any two sides and get the third with full working shown.
What Does This Tool Do?
Find any side of a right triangle — enter two sides and leave the third blank. Works for finding the hypotenuse (c) or either leg (a or b) using the Pythagorean theorem a² + b² = c².
Key Features
Any Side
Find a, b or c — whichever is missing.
Area
Triangle area calculated as a bonus.
Visual Diagram
Labelled right triangle shown.
Working Shown
Full formula with substituted values.
How to Use
- Enter any two of the three sides.
- Leave the side you want to find blank.
- Click Calculate.
Frequently Asked Questions
What is the Pythagorean theorem?▾
a² + b² = c², where a and b are the two legs of a right triangle and c is the hypotenuse (the side opposite the right angle).
Which side is the hypotenuse?▾
The hypotenuse (c) is always the longest side and is always opposite the right angle (90° angle).
Can I find a leg if I know the hypotenuse?▾
Yes: a = √(c² − b²). Enter the hypotenuse and one leg, leave the other leg blank.
Complete Guide to Pythagorean Theorem Calculator
When To Use This Tool
Use Pythagorean Theorem Calculator whenever you need fast, accurate output without installing software. This tool is designed for speed, clarity, and repeatable results for day-to-day work.
Best Practices for Accurate Results
- Double-check the format of your input before running the tool.
- Test with a small sample first, then process larger data.
- Use Related Tools to verify, convert, or transform the output.
Why Users Prefer AdeDX
AdeDX tools are browser-based, free to use, and built to work across desktop and mobile devices. Most processing happens directly in your browser for fast performance and improved privacy.