345 Calculator
Calculate the hypotenuse of a right triangle using the Pythagorean theorem
Calculate the hypotenuse of a right triangle using the Pythagorean theorem
The 345 Calculator is a professional tool designed for carpenters, builders, and DIY enthusiasts who need to calculate the hypotenuse of a right triangle. Based on the famous 3-4-5 triangle method used in construction, this calculator uses the Pythagorean theorem to find the third side when you know two sides.
Our 345 calculator is perfect for checking squareness, calculating diagonal measurements, and ensuring right angles in construction projects. Simply enter the lengths of two sides (A and B), and the tool calculates the hypotenuse (side C) instantly. This is essential for framing, squaring walls, and ensuring accurate right angles.
Explore our other professional construction calculators: Wall Layout Calculator for picture spacing, Angle Calculator for perfect miters, Wallplate Square Checker for framing accuracy, and Spindle Calculator for balustrade spacing. Visit our apps directory for more free construction tools.
The 345 calculator is trusted by UK construction professionals for accurate right triangle calculations. Whether you're squaring walls, checking corners, or calculating diagonal measurements, this tool helps you achieve perfect right angles and professional finishes. The calculator works with any measurement unit and provides precise results for both small and large projects.
For more information about construction techniques and the 3-4-5 method, visit CITB (Construction Industry Training Board) or consult Building Magazine for industry standards.