Checked against the source
Facebook cover photo size
Short answer
Facebook Help gives 851 × 315 pixels as the fastest-loading size: sRGB JPG, under 100 KB. The minimum is 400 × 150 px, and the cover is cropped differently on computers and phones.
Key takeaways
- The 851 × 315 frame is 2.70:1; Facebook Help says computers show a 16:9 crop and phones a 2.4:1 crop.
- The 100 KB figure is Facebook's loading-speed recommendation, not a limit; the table below shows which of our test results fall under it.
- To fit under 100 KB, lower the JPG quality or use the target size tool.
- Across our six test pictures the 851 × 315 result was 58.9 KB to 88.8 KB as a JPG at quality 0.92.
The size
| What | Value |
|---|---|
| Width | 851 px |
| Height | 315 px |
| Aspect ratio | 851:315 |
What the platform publishes
| What | Published value |
|---|---|
| Minimum | 400 × 150 px |
| Fastest loading | sRGB JPG, 851 × 315 px, under 100 KB |
| On a computer | Left-aligned, full bleed, 16:9 crop |
| On a phone | Left-aligned, full bleed, 2.4:1 crop |
Figures are for Facebook Page cover photos.
Source: Facebook Help: Page profile picture and cover photo dimensions (checked 2026-10-05)
Resize it now
Scales and center-crops any image to exactly 851 x 315 px, in your browser. Nothing is uploaded, there is no file size cap and no daily limit.
Batch is unlimited and free - every image is processed on your device, so there is no queue and no daily cap.
What a 851 × 315 frame does to common photo shapes
The frame is 2.70:1. A photo of another shape is scaled until it covers the frame and the excess is cut from the center, which is what the resizer on this page does. This is computed from the shapes.
| Photo shape | Share of the photo kept | What is cut |
|---|---|---|
| 16:9 (1920 × 1080) | 66% | The top and bottom |
| 3:2 (3000 × 2000) | 56% | The top and bottom |
| 4:3 (4000 × 3000) | 49% | The top and bottom |
| 1:1 (2000 × 2000) | 37% | The top and bottom |
| 4:5 (1080 × 1350) | 30% | The top and bottom |
| 9:16 (1080 × 1920) | 21% | The top and bottom |
Computed.
Measured: six pictures through the resizer
The resizer on this page was run in headless Chromium on six test pictures (public domain NASA scans, a PNG graphic and two small pictures made from them): each is scaled to cover 851 × 315, drawn on a white background and saved as a JPG at quality 0.92. SSIM compares each result with a Lanczos crop of the same picture made by ffmpeg (1.0 would be identical); it is blank when the frame has an odd side, which ffmpeg's check cannot compare. Other browsers use their own encoders, so sizes can differ.
| Picture | Pixels | Scale | Result | Time | SSIM | Against the 100 KB recommendation |
|---|---|---|---|---|---|---|
| Photo, nearly square | 3840 × 3877 | 0.22× | 88.8 KB | 5 ms | - | Under |
| Portrait | 2122 × 2644 | 0.40× | 60.8 KB | 7 ms | - | Under |
| Wide document scan | 3827 × 1588 | 0.22× | 76.9 KB | 5 ms | 0.94 | Under |
| Square PNG graphic | 5380 × 5432 | 0.16× | 67.9 KB | 4 ms | 0.92 | Under |
| Small portrait (1060 px) | 1060 × 1320 | 0.80× | 58.9 KB | 4 ms | - | Under |
| Small landscape (640 px) | 640 × 480 | 1.33× (enlarged) | 68.4 KB | 5 ms | - | Under |
A scale above 1 enlarges the picture to fill the frame; enlarging adds no detail, so start from a file at least as large as the frame. The limit used above is the 100 KB recommendation.
Detail decides the file size (measured)
The same frame holds 0.27 megapixels whatever the picture, but the JPG size follows the detail in it. Bits per pixel is the file size in bits divided by the number of pixels in the frame.
| Picture | Result | Bits per pixel |
|---|---|---|
| Photo, nearly square | 88.8 KB | 2.65 |
| Portrait | 60.8 KB | 1.81 |
| Wide document scan | 76.9 KB | 2.29 |
| Square PNG graphic | 67.9 KB | 2.03 |
| Small portrait (1060 px) | 58.9 KB | 1.76 |
| Small landscape (640 px) | 68.4 KB | 2.04 |
Smooth areas and flat color compress to a fraction of what fine detail needs; a photograph full of texture is the expensive case. If a size limit matters, check your own picture, not an average.
Using the Facebook cover photo size
- Start from a file at least 851 × 315 pixels so nothing is enlarged.
- Keep faces, logos and text away from the edges; every crop above cuts the edges.
- Check the platform's own page before you rely on a figure; sizes change.
- The resizer above does the crop and the JPG in your browser; nothing is uploaded.
Frequently asked questions
What size is a Facebook cover photo?
851 × 315 px is the fastest-loading size per Facebook Help; the minimum is 400 × 150 px.
Why is my cover blurry?
A cover smaller than the display size is enlarged. Start from at least 851 px wide, and keep important content away from the edges.
How much of a 16:9 photo is kept in 851 × 315?
66% of its area (computed).
What is the aspect ratio of 851 × 315?
2.70:1, 0.27 megapixels.
How big will the file be?
Our six test pictures came out between 58.9 KB and 88.8 KB as JPGs at quality 0.92; detailed photographs are the large end.
Is my picture uploaded?
No. The resizer runs in your browser.
Other Facebook sizes
Sources
- Facebook Help: Page profile picture and cover photo dimensions (checked 2026-10-05)
- Wikimedia Commons: Buzz salutes the U.S. Flag (NASA, public domain), one of the test pictures (checked 2026-10-10)
- MDN: HTMLCanvasElement.toBlob() (JPEG quality) (checked 2026-10-10)
