See https://www.w3schools.com/cssref/css_units.asp
| cm | mm | in | px | pt | pc |
|---|---|---|---|---|---|
| 1 | 0.01 | 100/254 | 4800/127 | 6400/127 | 76800/127 |
| 100 | 1 | 1/254 | 48/127 | 64/127 | 768/127 |
| 2.54 | 254 | 1 | 96 | 72 | 864 |
| 243.84 | 24384 | 1/96 | 1 | 4/3 | 16 |
| 182.88 | 18288 | 1/72 | 3/4 | 1 | 12 |
| 2194.56 | 219456 | 1/864 | 1/16 | 1/12 | 1 |