# Units of Measurement

Unit Size: Font Size:

## Relative Units

Unit | Abbr | Length | To Change
--- | --- | --- | ---
Width of capital M | em | M | Change font size.
Height of lowercase x | ex | x | Change font size.
Width of the number 0 | ch | 0 | Change font size.
Root em | rem |  | n/a
1/100th of Width of Viewport | vw |  | Change width of browser window.
1/100th of Height of Viewport | vh |  | Change height of browser window.
1/100th of Viewport's Smaller Dimension | vmin |  | Change height or width of browser window.
1/100th of Viewport's Larger Dimension | vmax |  | Change height or width of browser window.

## Absolute Units

Unit | Abbr | Length
--- | --- | ---
Pixels | px |
Quarter millimeters | q |
Millimeters | mm |
Centimeters | cm |
Picas | pc |
Points | pt |
Inches | in |

## Percentage