CSS Grid vs Flexbox – When to Use Which for Layout

CSS Grid vs Flexbox – When to Use Which

Grid and Flexbox solve different layout problems. Knowing when to use which leads to simpler, more maintainable code.

Flexbox in short

Flexbox lays out items in one direction – horizontally (row) or vertically (column). You control how items are distributed in that line (space-between, center), how they shrink or grow (flex-grow, flex-shrink), and alignment on the cross axis.

Typical uses: nav bar, button group, header with logo and menu, footer with link columns (if each column is a flex container), centering content in a card or section.

Grid in short

Grid defines a grid of rows and columns. You set column and row sizes (or leave them automatic) and place elements in cells – even spanning multiple cells. It’s good for overall page layout (header, sidebar, main, footer) and grids of same or different-sized items.

Typical uses: card gallery, main page layout (e.g. 12-column grid), any layout where you have rows and columns at once.

Rule of thumb

One dimension (a row of items or a single column) → Flexbox.
Two dimensions (grid, sidebar + content, card grid) → Grid.

Combining both

Often the page or section is built with Grid (e.g. one column on mobile, three on desktop). Inside each cell, content is arranged with Flexbox – e.g. title and button in a card, or items in a header. So Grid handles macro structure, Flexbox handles micro arrangement in components.

Support and fallback

Both work well in modern browsers. If you support very old browsers, Flexbox is usually the safer choice for complex layouts; for new projects Grid is fully viable.

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Frequently asked questions

What's the main difference between Grid and Flexbox?

Flexbox is for one dimension – row or column. Items are laid out in one line and distributed/aligned in it. Grid is for two dimensions – rows and columns at once; you control placement in a grid.

When do I use Flexbox?

For arranging items in a single row or column: navigation, button groups, header/footer alignment, centering content in a card or section. Ideal for components and rows of items.

When do I use Grid?

When you have a real grid – card grids, sidebar + main content, complex layouts with rows and columns. Grid is more powerful for overall page layout and two-dimensional structures.

Can I combine Grid and Flexbox?

Yes. Often one container is Grid (for overall page or section structure), and inside cells you use Flexbox to arrange content. They complement each other.

Browser support?

Both have excellent support in modern browsers. For very old browsers Flexbox has better support; Grid is fully viable for projects that don’t target old versions.