Calculate the hypotenuse or missing side of a right triangle. Free Pythagorean theorem calculator.
This pythagorean theorem tool lets you find the missing side of a right triangle given two sides. It is designed for speed and accuracy, running entirely in your browser with no data sent to any server. Whether you are a student, professional, or simply need a quick answer, this calculator provides instant results with clear explanations. Enter any two sides of a right triangle. If you enter the two legs (a and b), the calculator finds the hypotenuse using c = sqrt(a² + b²). If you enter the hypotenuse and one leg, it computes the missing leg using a = sqrt(c² - b²).
Enter any two sides of a right triangle. If you enter the two legs (a and b), the calculator finds the hypotenuse using c = sqrt(a² + b²). If you enter the hypotenuse and one leg, it computes the missing leg using a = sqrt(c² - b²).
Construction workers verify right angles on building sites. Architects calculate diagonal distances in floor plans. Students solve geometry homework. Surveyors determine distances across obstacles. DIY enthusiasts measure diagonal cuts for woodworking projects.
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Yes, this Pythagorean Theorem calculator is completely free with no signup, no account creation, and no usage limits. All calculations run locally in your browser, so your data stays private and results appear instantly.
This calculator uses standard mathematical formulas and internationally recognized conversion factors. Results are displayed with up to six significant digits of precision. For most everyday uses, the results are more than accurate enough.
Yes, the calculator is fully responsive and works on smartphones, tablets, and desktop computers. The interface automatically adjusts to your screen size. Touch inputs and on-screen keyboards work seamlessly.
Once the page has loaded in your browser, the calculator works without an internet connection. All computation happens locally using JavaScript. Bookmark the page for quick access anytime.
This calculator uses standard, well-established formulas that are widely accepted in education, science, and professional practice. The specific formula is explained in the "How it works" section above.