Plain Figures CreativeConverter for mm, cm, inches, points and pixels (ppi)
Convert sizes between millimetres, centimetres, inches, points and pixels, find how many pixels a print needs, and what resolution an image has when printed at a given size.
Convert a size
| mm | 210.00 × 297.00 |
|---|---|
| cm | 21.000 × 29.700 |
| in | 8.268 × 11.693 |
| pt | 595.28 × 841.89 |
| px | 2,480 (exact 2,480.31) × 3,508 (exact 3,507.87) |
| Megapixels | 8.70 |
What resolution does my print have?
Resolution: 338.7 ppi
How it works
An inch is exactly 25.4 mm and a point is 1/72 of an inch: with these two values millimetres, centimetres, inches and points convert exactly into each other; results are shown rounded.
Pixels have no physical size of their own. The resolution (ppi, pixels per inch) says how many pixels fit in an inch: pixels = inches × ppi. The same file therefore has different print sizes at different resolutions.
Whole pixels are rounded; the exact value is shown next to them. Which resolution a print needs depends on the printer and the printing process: ask them.
Sources
- SI Units – Length (1 inch = 25.4 mm exactly), National Institute of Standards and Technology (NIST) (retrieved on 20 October 2026)
- CSS Values and Units Module Level 3, absolute lengths (1mm = 1/10 cm, 1pt = 1/72 in), World Wide Web Consortium (W3C) (retrieved on 20 October 2026)