Quick converter
Type into any field — every unit in this category updates instantly.
Root font-size 16px
Common pt → em values
Click any row to open its dedicated page.
| pt | em |
|---|---|
| 4pt | 0.3333em |
| 6pt | 0.5em |
| 8pt | 0.6667em |
| 10pt | 0.8333em |
| 12pt | 1em |
| 14pt | 1.1667em |
| 16pt | 1.3333em |
| 18pt | 1.5em |
| 20pt | 1.6667em |
| 24pt | 2em |
| 28pt | 2.3333em |
| 32pt | 2.6667em |
| 36pt | 3em |
| 40pt | 3.3333em |
| 44pt | 3.6667em |
| 48pt | 4em |
| 56pt | 4.6667em |
| 64pt | 5.3333em |
| 72pt | 6em |
| 80pt | 6.6667em |
| 96pt | 8em |
| 112pt | 9.3333em |
| 128pt | 10.6667em |
| 144pt | 12em |
| 160pt | 13.3333em |
| 192pt | 16em |
| 224pt | 18.6667em |
| 256pt | 21.3333em |
Convert 40pt 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.
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