Diagonal & Hypotenuse Calc

Life Hack Developer

Contains ads

About this app

The ultimate hypotenuse and geometry calculator built for American construction, carpentry, and DIY — with native feet & inches support.

Whether you're squaring up a room, framing a wall, cutting rafter tails, or just figuring out if that 65-inch TV will fit — Diagonal Calculator gives you instant, accurate answers with zero internet required.

✦ What You Can Calculate
Right Triangle / Hypotenuse — Enter any two sides, get the third instantly. Perfect for the 3-4-5 rule and any Pythagorean problem.
Rectangle Diagonal — Square a room or any rectangular frame with one tap.
TV & Screen Size — Find the true screen measurement of any TV, monitor, or display from width and height.
Triangle Solver — Sides, angles, area — all solved for right, acute, and obtuse triangles.
Square, Parallelogram & More — Full coverage of common shapes.
✦ Built for US Builders & DIYers
Native feet and inches fractions input — type 3'5 5/16" just like you'd write it on a job ticket
Switch instantly between ft/in, inches, cm, mm, meters, and yards
Unit conversion panel covers 15+ units

Construction Notation Mode keeps every result in the format you recognize
100% offline — works on every job site, basement, or back yard
✦ Geometry Formulas Built In
Square: d = a√2 Rectangle: d = √(l² + w²) Right triangle: c = √(a² + b²) Parallelogram: d = √(a² + b² + 2ab·cosθ) Find side A or B: a = √(c² − b²)
✦ Who Uses This App
🪚 Carpenters & Framers — check square corners, plan cuts, and verify layouts fast
🏗️ General Contractors & Builders — align walls, calculate stair stringers, verify right angles
🏡 Homeowners & DIYers — tile layouts, deck planning, room dimensions — no math degree needed
📺 Electronics Shoppers — verify TV screen size before you buy or mount
🎓 Students & Teachers — visual, interactive tool for Pythagorean Theorem lessons
🏊 Interior & Landscape Designers — plan pools, patios, and large open spaces accurately
✦ Extra Features
Calculation history — review every result from today's session
Interactive triangle playground to explore angles and side relationships
Clean visual diagrams update as you type
Fast, lightweight — launches in under a second
From squaring a deck to acing geometry class, Diagonal Calculator is the offline measurement tool every American builder, student, and homeowner deserves.

Ratings and reviews

This application is very accurate and easy to learn.

Good for Engineering use.

Was very helpful ..thank you!!!!