Accurate Measurements
on Your Screen.
A very accurate, professional digital ruler for quick measurements directly from your browser. It is perfectly calibrated for designers, engineers, and daily use.
How to Use This Digital Ruler
Open the Website
Open penggarisdigital.com in any browser to start measuring quickly.
Keep Your Object
Simply place your physical item directly on the screen.
Check the Size
Look at the digital markings on the screen to get the exact size.
Change Units
You can easily switch between centimeters and inches from the top bar.
Calibrate for Accuracy
Use our calibration settings if the ruler is not perfectly matching.
Advanced Calibration Methods
To give you exactly 1:1 accuracy, our system uses multiple ways to check your screen's physical size.
Auto-Detection
- circle Easily recognizes phones from Apple, Samsung, Google, and more
- circle Automatically sets the factory PPI settings
- circle Saves your settings for the next time you visit
Manual Scaling
If auto-detect is not working, just type your screen's diagonal size for quick calibration.
Common Sizes
Object Calibration
Don't know your screen size? Just keep a standard credit card (85.60mm) on the screen to adjust the guide.
Supported Ecosystem
iOS / macOS
Retina Optimized
Android OS
Universal Scaling
Windows 11
Pixel Perfect
verified_user Guaranteed Accuracy
Our system is tested with standard physical rulers. You will get guaranteed accuracy of ±0.1mm if you calibrate properly and use it at 100% zoom level.