Aspect ratio and resolution calculator
Enter a resolution. Get its aspect ratio, megapixels and GPU workload, then resize it to a new width or height without stretching.
How aspect ratio works
Aspect ratio is the proportion of width to height. It is found by dividing both by their greatest common divisor. Keeping the ratio when you resize stops the picture stretching. The calculator also shows megapixels and the GPU work compared with 1080p, so you can see how much harder a wider or taller screen is to drive.
Common ratios and resolutions
| Ratio | Typical resolutions |
|---|---|
| 16:9 | 1920x1080, 2560x1440, 3840x2160 |
| 16:10 | 1920x1200, 2560x1600 |
| 21:9 ultrawide | 2560x1080, 3440x1440 |
| 32:9 super ultrawide | 3840x1080, 5120x1440 |
| 4:3 | 1024x768, 1600x1200 |
See which graphics card handles your screen with the monitor and GPU matcher, the pixel density in the monitor PPI calculator and upscaled resolutions in the render resolution calculator.
Frequently asked questions
How do I calculate aspect ratio?
Divide the width and height by their greatest common divisor. For example, 1920 by 1080 divides by 120 to give 16 to 9. The calculator does this for any resolution, and also shows the decimal ratio so you can compare screens quickly.
How do I resize a resolution without stretching it?
Keep the same ratio: multiply the new width by the height divided by the width. To scale 2560 by 1440 to a width of 1920, the height is 1080. Enter one new dimension in the calculator and it works out the other.
What aspect ratio do most monitors use?
Most gaming monitors are 16:9, such as 1080p, 1440p and 4K. Ultrawides are usually 21:9, super ultrawides 32:9, and some laptops and productivity monitors use 16:10. The table shows common resolutions for each.
Does a wider resolution need a stronger graphics card?
Yes. More pixels mean more work for the GPU. A 3440 by 1440 ultrawide has about a third more pixels than a 2560 by 1440 monitor. The calculator shows megapixels and the workload compared with 1080p.
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