8em to px
8em = 128px
At the browser default font size of 16 px. Change it and this number changes — see below.
How it is calculated
One em is 16px, so:
8em × 16 = 128pxReversing it, 128px × 0.0625 returns 8em.
8em at other font sizes
em is measured against the element's own font size, inherited from its parent unless it sets one, so the answer above holds only while that is 16 px. Nested elements each compound on their parent, so this is the value for one level, not for the whole tree.
| Font size | 8em equals |
|---|---|
| 14 px | 112px |
| 16 px (default) | 128px |
| 18 px | 144px |
| 20 px | 160px |
| 24 px | 192px |
Nearby values
| em | px |
|---|---|
| 8em | 128px |
| 10em | 160px |
| 12em | 192px |
| 14em | 224px |
| 16em | 256px |
Frequently asked questions
What is 8em in px?
128px at the default 16 px font size.
How is 8em converted to px?
Multiply by 16: 8 × 16 = 128. To go back, multiply 128 by 0.0625.
Is 128px always the answer?
No. em is relative to the element's own font size, inherited from its parent unless it sets one, so 8em is 128px only while that is 16 px. The table above gives the value at the sizes you are most likely to meet.