Need accurate on-screen measurements? PixyScale is a completely free, privacy-first screen ruler that automatically calibrates to each monitor's DPI, delivering true real-world measurements for 3D artists, UI/UX designers, architects, engineers, students, and professionals.
Unlike traditional screen rulers that assume every display has the same DPI, PixyScale automatically adjusts itself for every monitor, ensuring consistent and accurate measurements across single and multi-monitor setups.
Most on-screen rulers simply assume every display uses the same DPI. That assumption causes incorrect measurements, especially on modern high-resolution displays and multi-monitor workstations.
A 10 cm object displayed on:
- a Full HD laptop
- a 4K monitor
- a high-DPI display
can measure completely differently if the ruler isn't DPI-aware.
PixyScale solves this automatically.
Its measurement engine detects your monitor's physical DPI and calibrates the ruler accordingly, ensuring:
- ✅ Real-world accurate measurements
- ✅ Automatic per-monitor calibration
- ✅ Consistent measurements across multiple displays
- ✅ No manual calculations
- 3D Artists (Blender, ZBrush, Maya)
- UI/UX Designers
- Graphic Designers
- Architects
- Engineers
- CAD Professionals
- Students
- Technical Illustrators
- Anyone who needs accurate on-screen measurements
Watch PixyScale match a real-world ruler using automatic DPI calibration.
See multiple rulers, themes, rotation and opacity while measuring a 3D model.
| Feature | Benefit |
|---|---|
| 🖥 Automatic DPI Calibration | Accurate measurements on every monitor |
| 🖥 Multi-Monitor Support | Automatically recalibrates when moved between screens |
| 📏 CM / MM / Inches | Switch units instantly |
| ➕ Multiple Rulers | Open unlimited independent rulers |
| 🔄 Rotate | Horizontal & Vertical ruler |
| ↔ Reverse Direction | Measure from either side |
| 🎨 Multiple Themes | Light, Dark & Blueprint |
| 💧 Adjustable Opacity | Keep measurements visible while seeing your work underneath |
| 📐 DPI Calibration | Manual fine-tuning if required |
| 📦 System Tray | Minimize and restore anytime |
| ✨ Highlight Ruler | Blink animation makes lost rulers easy to find |
PixyScale was designed with privacy as a core principle.
- ✅ Works completely offline
- ✅ No account required
- ✅ No sign-up
- ✅ No activation
- ✅ No advertisements
- ✅ No tracking
- ✅ No analytics
- ✅ No telemetry
- ✅ No personal data collection
Your measurements never leave your computer.
- Operating System: Windows 10 (64-bit), Windows 11
- Architecture: x64
- Technology: Python + PyQt5
- Packaging: PyInstaller + MSIX
- Distribution: Microsoft Store
- Internet Required: No
- License: Free Forever
- Download PixyScale from the Microsoft Store.
- Launch the application.
- Select your monitor, DPI and preferred theme.
- Start measuring instantly.
No registration.
No activation.
No subscriptions.
No internet required.
Yes.
PixyScale is completely free with no subscriptions, activation, feature restrictions or hidden costs.
No.
The application works completely offline.
No.
PixyScale does not collect:
- Personal information
- Analytics
- Usage statistics
- Device identifiers
- Screen contents
Everything stays on your computer.
Most free rulers assume every monitor uses the same DPI, causing inaccurate measurements.
PixyScale automatically calibrates itself for every display, giving true real-world measurements even across multiple monitors.
Absolutely.
PixyScale was built specifically for precision workflows including:
- Blender
- ZBrush
- Maya
- CAD
- UI Design
- Architecture
- Engineering
- 3D Printing
Yes.
You can create as many independent rulers as needed and place them anywhere across your monitors.
Yes.
Although PixyScale automatically detects DPI, manual calibration is available for users who require absolute precision.
Found a bug?
Have a feature request?
Open an issue on GitHub or contact us directly.
⭐ If PixyScale helps you, consider leaving a review on the Microsoft Store. It helps more people discover the project.
Accurate. Offline. Free.
© 2026 Ritik Parmar. All rights reserved.