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Print size calculator
Will your photo print sharply at A4? Letter? 24×36 inches? Run the numbers before you spend on paper.
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For a sharp glossy print, you want at least 300 DPI. That means a 4×6 inch print needs 1200×1800 px, an 8×10 needs 2400×3000, an A4 (210×297 mm) needs 2480×3508, and a 24×36 inch poster needs 7200×10800.
For posters viewed from 1–2 meters away, 150 DPI is plenty. So a 24×36" poster can print acceptably from 3600×5400 px.
The tool below lets you crop to exact mm or inch dimensions and exports at 300 DPI metadata.
FAQ
What size can I print from a 12 MP photo?
Native ratio at 300 DPI ≈ 13×10 inches (33×25 cm). At 150 DPI you can go to 26×20 inches.
Difference between PPI and DPI?
PPI is pixels per inch (digital). DPI is dots per inch (print). For photo printing they are used interchangeably.
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