Free online 45-45-90 Triangle Calculator. Part of our comprehensive Math Calculators suite.
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The 45-45-90 Triangle Calculator is an essential online tool designed to quickly and accurately solve for the unknown sides of any 45-45-90 right triangle. Recognized for its specific angle configuration (45°, 45°, 90°), this type of triangle features leg lengths that are equal and a hypotenuse that is the leg length multiplied by the square root of 2. This calculator simplifies complex geometry problems for students, educators, engineers, and architects alike. By inputting just one known side—whether a leg or the hypotenuse—users can instantly retrieve the values of the remaining sides, saving significant time and ensuring precision in academic, design, and construction applications.