3440x1440 aspect ratio: 43:18, about 21:9 (2.38% off)
3440 × 1440 reduces to 43:18. The greatest common divisor of 3440 and 1440 is 80, so 3440 ÷ 80 = 43 and 1440 ÷ 80 = 18. That is 2.38% off 21:9. The nearest exact 21:9 sizes are 3360 × 1440 and 3444 × 1476.
Published · Updated · Sources last verified
At a glance
43:18
3440 × 1440 is about 21:9, 2.38% off.
- Decimal
- 2.389:1
- Nearest named ratio
- 21:9, 2.38% off
- Orientation
- Landscape
- Pixels
- 4,953,600
- Megapixels
- 4.95
- Greatest common divisor
- 80
How 3440 × 1440 reduces
- 3440 = 2 × 1440 + 560
- 1440 = 2 × 560 + 320
- 560 = 1 × 320 + 240
- 320 = 1 × 240 + 80
- 240 = 3 × 80 + 0
The last divisor, 80, is the greatest common divisor, so 3440 × 1440 reduces to 43:18. The method by hand is on the calculator page.
Crop or pad 3440 × 1440 to common ratios
How far 3440 × 1440 is from 21:9
3440 × 1440 is 2.38% off 21:9. The largest exact 21:9 size inside it is 3360 × 1440, 80 px narrower and the same height. The smallest exact 21:9 canvas around it is 3444 × 1476, 4 px wider and 36 px taller.
Whole-pixel downscales
| Divide by | Size | Whole pixels | Nearest whole size |
|---|---|---|---|
| ÷2 | 1720 × 720 | yes | same |
| ÷3 | 1146.67 × 480 | no | 1147 × 480, 0.029% off 43:18 |
| ÷4 | 860 × 360 | yes | same |
| ÷5 | 688 × 288 | yes | same |
| ÷6 | 573.33 × 240 | no | 573 × 240, 0.058% off 43:18 |
| ÷8 | 430 × 180 | yes | same |
| ÷10 | 344 × 144 | yes | same |
Nearest listed ratios
| Size | Reduced ratio | Decimal | Difference from 3440 × 1440 |
|---|---|---|---|
| 3440 × 1440this page's size | 43:18 | 2.389:1 | - |
| 2560 × 1080 | 64:27 | 2.37:1 | 0.78% |
| 1200 × 628 | 300:157 | 1.911:1 | 20% |
| 4096 × 2160 | 256:135 | 1.896:1 | 20.6% |
Facts about 3440 × 1440
- 3440 × 1440 is not exactly 21:9: 43:18 is 2.389, against 2.333 for 21:9, 2.38% apart.
- 3440 × 1440 divides into whole pixels by 2, 4, 5, 8 and 10; ÷3 gives 1146.67 × 480, which is not whole pixels.
- Turned on its side, 3440 × 1440 becomes 1440 × 3440 (18:43).
- Cropped to 9:16, 3440 × 1440 keeps 23.5% (810 × 1440); cropped to 16:9 it keeps 74.4% (2560 × 1440).
- 3440 × 1440 is 4,953,600 pixels (4.95 MP), 2.39 times the pixel count of 1920 × 1080.
Sourced notes
"21:9" is a marketing name. Wikipedia files the TVs sold as 21:9 cinema displays from 2009 to 2012 under 64:27, which is wider than an exact 21:9 (7:3).
Source: Wikipedia: Aspect ratio (image). Last verified 2026-10-05.
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Aspect ratio 43:18 (2.389:1). Nearest named ratio 21:9, 2.38% off.
Aspect ratio
43:18
2.389:1
Nearest named ratio: 21:9 (2.333).
Not exactly 21:9: 2.38% off. The nearest exact 21:9 sizes are 3360 × 1440 and 3444 × 1476.
43:18 is the true reduced ratio. Sizes like this are usually described by their decimal or by the nearest named ratio.
- Width ÷ height
- 2.3889
- Height ÷ width
- 0.4186
- Shape
- landscape
Your numbers, worked
gcd(3440, 1440) = 80
3440 ÷ 80 = 43
1440 ÷ 80 = 18
3440 ÷ 1440 = 2.3889
Show how the gcd was found
- 3440 = 2 × 1440 + 560
- 1440 = 2 × 560 + 320
- 560 = 1 × 320 + 240
- 320 = 1 × 240 + 80
- 240 = 3 × 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 3440 × 1440
The largest centred crop at each ratio, best fit first. Crop rather than stretch.
| Ratio | Fit | Crop to | Lost |
|---|---|---|---|
| 21:9 | Trim width | 3360 × 1440 | 2.33% |
| 2:1 | Trim width | 2880 × 1440 | 16.3% |
| 1.91:1 | Trim width | 2750 × 1440 | 20.1% |
| 16:9 | Trim width | 2560 × 1440 | 25.6% |
| 32:9 | Trim height | 3440 × 968 | 32.8% |
| 16:10 | Trim width | 2304 × 1440 | 33% |
| 3:2 | Trim width | 2160 × 1440 | 37.2% |
| 4:3 | Trim width | 1920 × 1440 | 44.2% |
| 5:4 | Trim width | 1800 × 1440 | 47.7% |
| 1:1 | Trim width | 1440 × 1440 | 58.1% |
| 4:5 | Trim width | 1152 × 1440 | 66.5% |
| 3:4 | Trim width | 1080 × 1440 | 68.6% |
| 2:3 | Trim width | 960 × 1440 | 72.1% |
| 9:16 | Trim width | 810 × 1440 | 76.5% |
Solve the missing side
Pick a ratio, then enter the side you know.
Height is 1440. Size 3440 by 1440 pixels.
Size at 43:18
3440 × 1440
Height solved, in pixels.
Your numbers, worked
H = W × 18 ÷ 43 = 3440 × 18 ÷ 43 = 1440
Whole number, so no rounding is needed.
Pixel-exact: a 43:18 size needs the width to be a multiple of 43, and 3440 is 80 × 43.
Questions
What aspect ratio is 3440x1440?
3440 × 1440 is 43:18 (2.389:1). Dividing both sides by their greatest common divisor, 80, gives 43 and 18. The nearest named ratio is 21:9, 2.38% away, so it is close to 21:9 but not exactly it.
Is 3440x1440 exactly 21:9?
No. 3440 ÷ 1440 = 2.3889, against 2.3333 for 21:9, 2.38% apart. The largest exact 21:9 size inside it is 3360 × 1440; the smallest exact 21:9 canvas around it is 3444 × 1476.
What is 3440x1440 cropped to 9:16?
A centered 9:16 crop of 3440 × 1440 is 810 × 1440, which keeps 23.5% of the image. Padding it to 9:16 instead gives a 3440 × 6116 canvas with 4,676 px of bars. That canvas is rounded, not exactly 9:16: the exact padded side would be 6115.56 px tall. The smallest exact 9:16 canvas around it is 3447 × 6128.
Nearby sizes
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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.