Quick converter
Type into any field — every unit in this category updates instantly.
Root font-size 16px
Common % → em values
Click any row to open its dedicated page.
| % | em |
|---|---|
| 4% | 0.04em |
| 6% | 0.06em |
| 8% | 0.08em |
| 10% | 0.1em |
| 12% | 0.12em |
| 14% | 0.14em |
| 16% | 0.16em |
| 18% | 0.18em |
| 20% | 0.2em |
| 24% | 0.24em |
| 28% | 0.28em |
| 32% | 0.32em |
| 36% | 0.36em |
| 40% | 0.4em |
| 44% | 0.44em |
| 48% | 0.48em |
| 56% | 0.56em |
| 64% | 0.64em |
| 72% | 0.72em |
| 80% | 0.8em |
| 96% | 0.96em |
| 112% | 1.12em |
| 128% | 1.28em |
| 144% | 1.44em |
| 160% | 1.6em |
| 192% | 1.92em |
| 224% | 2.24em |
| 256% | 2.56em |
Convert 256% to other units
Formula
rem = px ÷ root-font-size and px = rem × root-font-size. Browsers default the root font-size to 16px, so 1rem normally equals 16px unless the page (or the user's browser settings) changes it.
em works the same way, but relative to the parent element's font-size rather than the root — the numbers only match rem when nothing in the ancestor chain has resized the font.
pt is a print unit: 1pt = 1.333px, based on the fixed 96px-per-inch / 72pt-per-inch relationship browsers use.
Use it in code
Click to copy.