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Pixels ↔ mm converter
How big is 600×600 px in millimeters? It depends on DPI. Quick reference and a tool below.
Drop a photo here, or tap to choose
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At 300 DPI: 600 px = 50.8 mm = 2 inches. At 150 DPI: 600 px = 101.6 mm = 4 inches. At 72 DPI: 600 px = 211.7 mm = 8.33 inches.
Formula: mm = pixels × 25.4 ÷ DPI. Inches = pixels ÷ DPI.
Use the editor below in `mm` mode to crop directly to a physical size — the pixel math is automatic.
FAQ
What is 1 inch in pixels?
300 px at 300 DPI, 150 px at 150 DPI, 72 px at 72 DPI. Multiply DPI × inches.
Why does my photo look bigger on one screen than another?
Different displays have different pixel densities. Physical (mm) dimensions only matter for print.
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