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Dataset 20260827-2142-2f1b575 · measured 2026-08-27 21:42 UTC
columns
✕renders differentlycss-multicol-2
The property takes effect, but our pixels are not Chrome's. The difference map on this page shows where.
What the specification says
- Initial value
- see individual properties
- Applies to
- see individual properties
- Inherited
- see individual properties
- Percentages
- see individual properties
- Computed value
- see individual properties
- Syntax
- [ <'column-width'> || <'column-count'> ] [ / <'column-height'> ]?
The measurements
Each example is one declaration on a small page, drawn by Chrome and by our engine. Drag the handle to wipe between them.
columns:20px✓pixel-exact
Our renderChrome1,424 pixels differ from Chrome, the largest by 238 of 255 on one channel.
- Differing pixels
- 1,424
- Max channel delta
- 238
columns:20px / auto✓pixel-exactOur renderChrome1,424 pixels differ from Chrome, the largest by 238 of 255 on one channel.
- Differing pixels
- 1,424
- Max channel delta
- 238
columns:20px / 20px✕renders differently
Our renderChrome10,604 pixels differ from Chrome, the largest by 255 of 255 on one channel.
- Differing pixels
- 10,604
- Max channel delta
- 255
columns:2✕renders differently
Our renderChrome1,844 pixels differ from Chrome, the largest by 238 of 255 on one channel.
- Differing pixels
- 1,844
- Max channel delta
- 238
columns:auto✕renders differently
Our renderChrome2,456 pixels differ from Chrome, the largest by 238 of 255 on one channel.
- Differing pixels
- 2,456
- Max channel delta
- 238
columns:3✕renders differently
Our renderChrome27,722 pixels differ from Chrome, the largest by 248 of 255 on one channel.
- Differing pixels
- 27,722
- Max channel delta
- 248
Which values were measured
“Supported” on one example means “supported at the value we tried”. The property’s declared grammar has 7 branches; 5 of them carry a measurement. The publishing ceiling is 12 examples per property — a branch past it is left out by our choice, not by accident.
| Value | Measured |
|---|---|
| 20px | ✓pixel-exact |
| min-content | not measured |
| max-content | not measured |
| 2 | ✕renders differently |
| 20px / 20px | ✕renders differently |
| 20px / auto | ✓pixel-exact |
| auto | ✕renders differently |
Measured against Chrome 148.0.7778.96 on 2026-08-27, with up to 40 candidate values tried per property. All properties · How the measurement works