1280x720 aspect ratio: 16:9 (1.778:1)
1280 × 720 reduces to 16:9. The greatest common divisor of 1280 and 720 is 80, so 1280 ÷ 80 = 16 and 720 ÷ 80 = 9. That is exactly 16:9.
Published · Updated · Sources last verified
At a glance
16:9
1280 × 720 is exactly 16:9.
- Decimal
- 1.778:1
- Nearest named ratio
- 16:9, exact
- Orientation
- Landscape
- Pixels
- 921,600
- Megapixels
- 0.92
- Greatest common divisor
- 80
How 1280 × 720 reduces
- 1280 = 1 × 720 + 560
- 720 = 1 × 560 + 160
- 560 = 3 × 160 + 80
- 160 = 2 × 80 + 0
The last divisor, 80, is the greatest common divisor, so 1280 × 720 reduces to 16:9. The method by hand is on the calculator page.
Crop or pad 1280 × 720 to common ratios
Whole-pixel downscales
| Divide by | Size | Whole pixels | Nearest whole size |
|---|---|---|---|
| ÷2 | 640 × 360 | yes | same |
| ÷3 | 426.67 × 240 | no | 427 × 240, 0.078% off 16:9 |
| ÷4 | 320 × 180 | yes | same |
| ÷5 | 256 × 144 | yes | same |
| ÷6 | 213.33 × 120 | no | 213 × 120, 0.16% off 16:9 |
| ÷8 | 160 × 90 | yes | same |
| ÷10 | 128 × 72 | yes | same |
Other listed sizes at 16:9
| Size | Scale from 1280 × 720 | Whole-number scale | Pixel count |
|---|---|---|---|
| 1280 × 720this page's size | 1 | - | 1× |
| 1920 × 1080 | 1.5 | no | 2.25× |
| 2560 × 1440 | 2 | yes, ×2 | 4× |
| 3840 × 2160 | 3 | yes, ×3 | 9× |
Facts about 1280 × 720
- 1280 × 720 is exactly 16:9: 80 × 16 by 80 × 9.
- 1280 × 720 divides into whole pixels by 2, 4, 5, 8 and 10; ÷3 gives 426.67 × 240, which is not whole pixels.
- Among the other listed 16:9 sizes, 2560 × 1440 (×2) and 3840 × 2160 (×3) are whole-number multiples of it; 1920 × 1080 (×1.5) is not a whole-number scale of it.
- Turned on its side, 1280 × 720 becomes 720 × 1280 (9:16).
- Cropped to 9:16, 1280 × 720 keeps 31.6% (405 × 720); cropped to 1:1 it keeps 56.3% (720 × 720).
- 1280 × 720 is 921,600 pixels (0.92 MP), 0.44 times the pixel count of 1920 × 1080.
Sourced notes
This size is one of the resolutions in YouTube's recommended 16:9 upload list.
Source: YouTube Help: recommended upload resolutions and aspect ratios. Last verified 2026-10-05.
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Aspect ratio 16:9 (1.778:1). Exact match for 16:9.
Aspect ratio
16:9
1.778:1
Exact match for 16:9.
- Width ÷ height
- 1.7778
- Height ÷ width
- 0.5625
- Shape
- landscape
Your numbers, worked
gcd(1280, 720) = 80
1280 ÷ 80 = 16
720 ÷ 80 = 9
1280 ÷ 720 = 1.7778
Show how the gcd was found
- 1280 = 1 × 720 + 560
- 720 = 1 × 560 + 160
- 560 = 3 × 160 + 80
- 160 = 2 × 80 + 0
Divide the larger side by the smaller, then divide the last divisor by the remainder until the remainder is 0. The last divisor is the gcd.
What each ratio would cut from 1280 × 720
The largest centred crop at each ratio, best fit first. Crop rather than stretch.
| Ratio | Fit | Crop to | Lost |
|---|---|---|---|
| 16:9 | Exact | 1280 × 720 | 0% |
| 1.91:1 | Trim height | 1280 × 670 | 6.94% |
| 16:10 | Trim width | 1152 × 720 | 10% |
| 2:1 | Trim height | 1280 × 640 | 11.1% |
| 3:2 | Trim width | 1080 × 720 | 15.6% |
| 21:9 | Trim height | 1280 × 549 | 23.8% |
| 4:3 | Trim width | 960 × 720 | 25% |
| 5:4 | Trim width | 900 × 720 | 29.7% |
| 1:1 | Trim width | 720 × 720 | 43.8% |
| 32:9 | Trim height | 1280 × 360 | 50% |
| 4:5 | Trim width | 576 × 720 | 55% |
| 3:4 | Trim width | 540 × 720 | 57.8% |
| 2:3 | Trim width | 480 × 720 | 62.5% |
| 9:16 | Trim width | 405 × 720 | 68.4% |
Solve the missing side
Pick a ratio, then enter the side you know.
Height is 720. Size 1280 by 720 pixels.
Size at 16:9
1280 × 720
Height solved, in pixels.
Your numbers, worked
H = W × 9 ÷ 16 = 1280 × 9 ÷ 16 = 720
Whole number, so no rounding is needed.
Pixel-exact: a 16:9 size needs the width to be a multiple of 16, and 1280 is 80 × 16.
Questions
What aspect ratio is 1280x720?
1280 × 720 is 16:9 (1.778:1). Dividing both sides by their greatest common divisor, 80, gives 16 and 9. That is exactly 16:9.
How do I resize 1280x720 without distortion?
Keep the ratio at 16:9: new height = new width × 9 ÷ 16. Dividing both sides by 2, 4, 5, 8 or 10 keeps whole pixels, for example 128 × 72 at ÷10.
What is 1280x720 cropped to 9:16?
A centered 9:16 crop of 1280 × 720 is 405 × 720, which keeps 31.6% of the image. Padding it to 9:16 instead gives a 1280 × 2276 canvas with 1,556 px of bars. That canvas is rounded, not exactly 9:16: the exact padded side would be 2275.56 px tall. The smallest exact 9:16 canvas around it is 1287 × 2288.
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Apart from the sourced notes above, which devices use this size, and marketing names for it, are not covered: we did not verify a primary source for them, so this page sticks to arithmetic.