1200 x 630 pixels
1200 x 630 px is a 1.91:1 landscape size, the Facebook post image size. 1200 divided by 630 is 1.9048, and dividing both by their greatest common divisor, 30, reduces the fraction exactly to 40:21, which is rounded to 1.91:1 in practice. It is 0.76 megapixels (756,000 pixels) with a diagonal of 1,355 px.
Who uses 1200 x 630
| Platform | Asset | Role | Source |
|---|---|---|---|
| Feed post | Recommended size | Convention |
1200x630 vs 630x1200
630x1200 is the same two numbers swapped, and that makes it a different shape: 1:1.91 portrait instead of 1.91:1 landscape. Width is always written first, so 1200x630 is 1200 pixels wide and 630 tall, while 630x1200 is 630 wide and 1200 tall. As decimals that is 1.9048 against 0.525. Cropping one to fill the other keeps only 27.6 percent of the picture, so the two are not interchangeable.
No platform size in this dataset is 630x1200: every use listed above is 1200 wide by 630 tall. If an export meant for one of them comes out as 630x1200, the two numbers were entered the wrong way round.
What the numbers mean
The pixel count is what the file stores. It is not the size the image appears at on a screen, and the two get confused constantly. A display measures its layout in CSS pixels, and most phones draw two or three physical pixels for every CSS pixel. That device pixel ratio is why an avatar that occupies 110 CSS pixels wants a file several times wider: on a 2x screen those 110 CSS pixels are 220 physical ones, and a 110 px file gets upscaled to fill them.
So 1200 by 630 is a statement about the file, not about how large it looks. Whether it is enough depends on the largest surface it has to fill and on the pixel ratio of the screen filling it, which is why the platform pages above carry a minimum width as well as a recommended size.
Resize an image to 1200 x 630
Preloaded to this exact size. It runs in your browser, so nothing is uploaded anywhere.
Keep the 1200x630 shape at another size
Preloaded with 40:21, the exact ratio of 1200 by 630. Type a new width or height and the calculator solves the other side, so the shape stays identical.
Common ratios
Type in either the width or the height and the other side solves to keep the ratio.
40:21 at 1200 px wide
1200 x 630px
The height is 630 px.
height = 1200 x 21 / 40 = 630 px.
- Ratio
- 40:21
- Decimal
- 1.9048
- Result ratio
- 40:21
Starting from other numbers? Open 1200 x 630 in the aspect ratio calculator to find the ratio of any width and height.
Questions about 1200x630
Is 1200x630 1.91:1?
Closest other sizes
Nearest by shape, so a crop between any of these loses the least. Sorted by how far each one is from 1.9048.
Every size on one page: the cheat sheet. Last verified 2026-07-27.