Grid Column Width Calculator β€” Visual CSS Grid Builder

Use this tool to calculate and preview column span behavior in CSS Grid. Adjust total columns, gaps, and span values. Copy-ready CSS included for both parent and child elements.

Grid Column Input
Total Columns
Column Gap (px)
Computed Width: 25.0000%
For Child Item
Span Columns
1
2
3
4
5
6
7
8
9
10
11
12
CSS (Container)
For Child Item
Spanning 3 / 12 columns
CSS (Child Item)

Why This Tool?

CSS Grid layouts can be hard to visualize. This tool helps you understand column spanning and gaps in real time, so you can build responsive layouts faster with less trial-and-error.

Example Use Cases

  • πŸ“ Building responsive card layouts with defined grid columns
  • πŸ“Š Laying out dashboard widgets that span multiple columns
  • πŸ“¦ Creating reusable layout systems in component libraries

How It Works

  1. Choose your total column count and gap size.
  2. Preview the full grid structure in real-time.
  3. Set how many columns a child element should span.
  4. Copy the container and child CSS for direct use.

Frequently Asked Questions (FAQs)

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