Best Screen Measurement Tools for Windows (2026)

Finding the right ruler for your screen

Whether you're auditing a UI, measuring a medical scan, or checking a miter angle on a CAD drawing, Windows doesn't ship with a professional measurement tool. Here are the best alternatives available in 2026.

1. Screen Calipers (Iconico)

The industry standard for pros who need rotation and calibration. It stays on top of any app and reads in any unit.

2. Microsoft PowerToys Screen Ruler

A great free option for developers and designers who only need horizontal and vertical pixel counts.

3. Screen Protractor (Iconico)

Essential for engineering and STEM education, allowing you to measure any angle on your screen with pixel accuracy.

4. EP Calipers

A specialized tool for electrophysiology and complex QTc calculations in cardiology.

5. ColorPic (Iconico)

While primarily a color picker, its built-in magnifier and palette management make it an essential tool for design audits.