Reference table
Typography: points, picas, millimetres and pixels
Print and web use different points. A DTP point is 1/72 inch and a CSS pixel is 1/96 inch. The table shows the same type size in every unit.
| pt | px | mm | pc |
|---|---|---|---|
| 1 | 1.33333333 px | 0.35277778 mm | 0.08333333 pc |
| 6 | 8 px | 2.11666667 mm | 0.5 pc |
| 8 | 10.66666667 px | 2.82222222 mm | 0.66666667 pc |
| 9 | 12 px | 3.175 mm | 0.75 pc |
| 10 | 13.33333333 px | 3.52777778 mm | 0.83333333 pc |
| 11 | 14.66666667 px | 3.88055556 mm | 0.91666667 pc |
| 12 | 16 px | 4.23333333 mm | 1 pc |
| 14 | 18.66666667 px | 4.93888889 mm | 1.16666667 pc |
| 18 | 24 px | 6.35 mm | 1.5 pc |
| 24 | 32 px | 8.46666667 mm | 2 pc |
| 36 | 48 px | 12.7 mm | 3 pc |
| 72 | 96 px | 25.4 mm | 6 pc |
12 pt make one pica and 72 pt make one inch. On the web 1 px is defined as 1/96 inch, so 12 pt equals 16 px there. That 16 px only holds at 100 percent zoom: browsers scale type independently and the system setting can change the base size. The inch relation (1 in = 25.4 mm) comes from the unit system, while the point definitions come from print and the CSS specification.