1280x800 aspect ratio: 16:10 (8:5)
1280 × 800 reduces to 8:5. The greatest common divisor of 1280 and 800 is 160, so 1280 ÷ 160 = 8 and 800 ÷ 160 = 5. That is exactly 16:10, which reduces to 8:5.
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At a glance
8:5
1280 × 800 is exactly 16:10.
- Decimal
- 1.6:1
- Nearest named ratio
- 16:10, exact
- Orientation
- Landscape
- Pixels
- 1,024,000
- Megapixels
- 1.02
- Greatest common divisor
- 160
How 1280 × 800 reduces
- 1280 = 1 × 800 + 480
- 800 = 1 × 480 + 320
- 480 = 1 × 320 + 160
- 320 = 2 × 160 + 0
The last divisor, 160, is the greatest common divisor, so 1280 × 800 reduces to 8:5. The method by hand is on the calculator page.
Crop or pad 1280 × 800 to common ratios
Whole-pixel downscales
| Divide by | Size | Whole pixels | Nearest whole size |
|---|---|---|---|
| ÷2 | 640 × 400 | yes | same |
| ÷3 | 426.67 × 266.67 | no | 427 × 267, 0.047% off 8:5 |
| ÷4 | 320 × 200 | yes | same |
| ÷5 | 256 × 160 | yes | same |
| ÷6 | 213.33 × 133.33 | no | 213 × 133, 0.094% off 8:5 |
| ÷8 | 160 × 100 | yes | same |
| ÷10 | 128 × 80 | yes | same |
Other listed sizes at 8:5
| Size | Scale from 1280 × 800 | Whole-number scale | Pixel count |
|---|---|---|---|
| 1280 × 800this page's size | 1 | - | 1× |
| 1440 × 900 | 1.125 | no | 1.266× |
| 1680 × 1050 | 1.313 | no | 1.723× |
| 1920 × 1200 | 1.5 | no | 2.25× |
| 2560 × 1600 | 2 | yes, ×2 | 4× |
Facts about 1280 × 800
- 1280 × 800 is exactly 16:10: 160 × 8 by 160 × 5.
- 1280 × 800 divides into whole pixels by 2, 4, 5, 8 and 10; ÷3 gives 426.67 × 266.67, which is not whole pixels.
- Among the other listed 8:5 sizes, 2560 × 1600 (×2) is a whole-number multiple of it; 1920 × 1200 (×1.5), 1680 × 1050 (×1.313) and 1440 × 900 (×1.125) are not whole-number scales of it.
- Turned on its side, 1280 × 800 becomes 800 × 1280 (5:8).
- Cropped to 9:16, 1280 × 800 keeps 35.2% (450 × 800); cropped to 16:9 it keeps 90% (1280 × 720).
- 1280 × 800 is 1,024,000 pixels (1.02 MP), 0.49 times the pixel count of 1920 × 1080.
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Aspect ratio 8:5 (1.6:1). Exact match for 16:10.
Aspect ratio
8:5
1.6:1
Exact match for 16:10.
- Width ÷ height
- 1.6
- Height ÷ width
- 0.625
- Shape
- landscape
Your numbers, worked
gcd(1280, 800) = 160
1280 ÷ 160 = 8
800 ÷ 160 = 5
1280 ÷ 800 = 1.6
Show how the gcd was found
- 1280 = 1 × 800 + 480
- 800 = 1 × 480 + 320
- 480 = 1 × 320 + 160
- 320 = 2 × 160 + 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 × 800
The largest centred crop at each ratio, best fit first. Crop rather than stretch.
| Ratio | Fit | Crop to | Lost |
|---|---|---|---|
| 16:10 | Exact | 1280 × 800 | 0% |
| 3:2 | Trim width | 1200 × 800 | 6.25% |
| 16:9 | Trim height | 1280 × 720 | 10% |
| 1.91:1 | Trim height | 1280 × 670 | 16.2% |
| 4:3 | Trim width | 1067 × 800 | 16.6% |
| 2:1 | Trim height | 1280 × 640 | 20% |
| 5:4 | Trim width | 1000 × 800 | 21.9% |
| 21:9 | Trim height | 1280 × 549 | 31.4% |
| 1:1 | Trim width | 800 × 800 | 37.5% |
| 4:5 | Trim width | 640 × 800 | 50% |
| 3:4 | Trim width | 600 × 800 | 53.1% |
| 32:9 | Trim height | 1280 × 360 | 55% |
| 2:3 | Trim width | 533 × 800 | 58.4% |
| 9:16 | Trim width | 450 × 800 | 64.8% |
Solve the missing side
Pick a ratio, then enter the side you know.
Height is 800. Size 1280 by 800 pixels.
Size at 16:10
1280 × 800
Height solved, in pixels.
Your numbers, worked
H = W × 10 ÷ 16 = 1280 × 10 ÷ 16 = 800
Whole number, so no rounding is needed.
Pixel-exact: a 8:5 size needs the width to be a multiple of 8, and 1280 is 160 × 8.
Questions
What aspect ratio is 1280x800?
1280 × 800 is 8:5 (1.6:1). Dividing both sides by their greatest common divisor, 160, gives 8 and 5. That is exactly 16:10, which reduces to 8:5.
How do I resize 1280x800 without distortion?
Keep the ratio at 8:5: new height = new width × 5 ÷ 8. Dividing both sides by 2, 4, 5, 8 or 10 keeps whole pixels, for example 128 × 80 at ÷10.
What is 1280x800 cropped to 9:16?
A centered 9:16 crop of 1280 × 800 is 450 × 800, which keeps 35.2% of the image. Padding it to 9:16 instead gives a 1280 × 2276 canvas with 1,476 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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