Unit converter
Convert between px, rem, pt, mm, cm and inches for web and print. For print, choose the resolution you will print the image at.
Unit
rem
1,5 rem
multiple of 16 px
pt
18 pt
typographic point, 1/72 inch
mm
6,35 mm
millimetre
cm
0,635 cm
centimetre
in
0,25 in
inch
On the web the browser uses a fixed conversion: 1 inch = 96 CSS pixels, regardless of the real pixel density of the display. Millimetres on screen are therefore not physically accurate.
Paper sizes in pixels
How many pixels a print file needs at 300 DPI. Sizes are without bleed.
| Format | mm | px at 300 DPI |
|---|---|---|
| A6 | 105 × 148 | 1240 × 1748 |
| A5 | 148 × 210 | 1748 × 2480 |
| A4 | 210 × 297 | 2480 × 3508 |
| A3 | 297 × 420 | 3508 × 4961 |
| A2 | 420 × 594 | 4961 × 7016 |
| Roll-up 85 × 200 cm | 850 × 2000 | 10039 × 23622 |