DPI Scaling Calculator
Find the optimal Windows/macOS display scaling for your monitor
Enter Your Resolution
Input your monitor’s native resolution. Common resolutions: 1920x1080 (FHD), 2560x1440 (QHD), 3840x2160 (4K).
Enter Screen Size
Input your monitor’s diagonal size in inches. The calculator uses this with resolution to determine pixel density (PPI).
Apply Recommended Scaling
The calculator suggests optimal scaling based on a target of approximately 110 PPI effective density, which provides comfortable text and UI sizing.
Why Scale Matters
High-resolution displays pack more pixels into the same space, making text and UI tiny. Scaling enlarges everything proportionally for readability.
Integer Scaling
100%, 200%, 300% provide pixel-perfect rendering. Non-integer values like 150% may cause slight blurring in some apps.
Effective Resolution
At 150% scaling, a 4K display (3840×2160) renders UI as if it were 2560×1440, but with sharper text and graphics.
macOS vs Windows
macOS uses @2x Retina scaling (200%). Windows offers finer control with 25% increments. Both achieve similar results at proper settings.