FindRadius is the fastest and most accurate radius calculator for arcs, tubes, plates, and circular parts. Designed for engineers, technicians, metalworkers, makers, and anyone who needs precise geometric calculations, FindRadius transforms complex formulas into a simple and reliable tool you can use anywhere.

🔍 What it does

With just two measurements — Chord (L) and Sagitta/Height (h) — the app instantly calculates:

Radius (R)

Angle (θ)

Arc length (s)

Diameter

And other geometric relationships

Perfect for sheet-metal bending, plate rolling, calendering, flanges, pipe inspections, reverse engineering, mechanical design, and on-site measurements.

⚙️ Key Features

✔️ Ultra-fast radius calculation using precise mathematical formulas

✔️ Smart input validation to avoid errors

✔️ Clean and intuitive interface

✔️ Light and fast — works offline

✔️ Customizable units: mm, cm, m, inch, ft

✔️ Saved History (premium)

✔️ Ad-free experience (premium upgrade available)

🎯 Perfect for

Mechanical engineers

CAD designers (SolidWorks, AutoCAD, Fusion 360…)

Sheet metal professionals

Calendering and bending operators

CNC programmers

Welders / fabricators

Students and makers

🔒 Privacy First

Your data stays 100% on your device.
No account, no login, no cloud upload.
History is stored locally and can be erased anytime.

💎 Premium Version

Unlock advanced features:

Remove all ads

Access calculation history

Better workflow and productivity

📏 Why FindRadius?

Because measuring a radius in the field is often hard — and doing the formula manually takes time.
FindRadius gives you speed, accuracy, and confidence in one tap.