Calculator
What the CSS Grid Generator does
CSS Grid Generator: generates Status and Grid CSS from Columns, Rows and Gap (px). Example: columns 3, rows 2 and gap (px) 16 gives status CSS ready.
Status and Grid CSS, derived from Columns, Rows and Gap (px). Results refresh instantly, so trying variations costs nothing but a moment.
Spotting a malformed field is far quicker when the structure is laid out clearly. That is usually what brings developers debugging a payload here.
Your data stays on your machine. Once the page has loaded you could disconnect entirely and it would still work.
If you want to check the arithmetic, the field table, the method and a worked example are further down.
What do the CSS Grid Generator fields mean?
The CSS Grid Generator uses 3 inputs. A complete set of starting values is loaded for you, so nothing is required before the first result appears.
| Field | What to enter | Default |
|---|---|---|
| Columns | accepts 1 to 12 | 3 |
| Rows | accepts 1 to 12 | 2 |
| Gap (px) | optional | 16 |
How does the CSS Grid Generator work?
Each output is derived from the inputs above in a single pass; there is no hidden state carried between runs, so the same inputs always give the same generated output.
Validation is deliberately strict: silently coercing a bad value is how wrong numbers get trusted.
Worked example
These are the values the CSS Grid Generator loads by default, and the result it produces from them. This walkthrough uses the starting values, which means you can follow along without typing anything.
| Columns | 3 |
|---|---|
| Rows | 2 |
| Gap (px) | 16 |
| Status | CSS ready |
|---|---|
| Grid CSS | display: grid; grid-template-columns: repeat(3, 1fr); grid-template-rows: repeat(2, auto); gap: 16px; |
How to use it
- Fill in Columns (1 to 12).
- Type Rows (1 to 12).
- Enter Gap (px).
- Type a value and the answer is already there by the time you stop.
- The panel reports Status and Grid CSS.
- Share the link rather than a screenshot. It carries the values with it.
What this tool does not do
- Output follows the common convention for this format; a specific toolchain may have its own house style.
- Processing happens in your browser, so very large inputs are bounded by available memory.
- It cannot flag an input that is technically valid but wrong for your case.
- The tool cannot tell whether a number was entered in the unit you intended, so double-check the labels.
Frequently asked questions
Only Columns, Rows and Gap (px). Each field is pre-filled with a sensible default, letting you treat it as a what-if tool rather than a data-entry form.
Columns accepts 1 to 12. If a value falls outside, the tool says which field is at fault instead of guessing.
With the values loaded when the page opens, status comes out as CSS ready. Change a value and the number is recomputed on the spot.
Not at all: the whole thing runs offline once the page has loaded, which tells you nothing is being sent.
It is free to use, with no premium tier holding back the useful parts.
It matches what you would get working it out by hand, with fewer opportunities to slip.