Aspect Ratio Calculator

Multiple times per month I ask myself: what aspect ratio is this pixel amount? This is the tool that helps me know better.

Use the form below to calculate the missing value for a particular aspect ratio. This is useful, for example, when resizing photos or video.

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Round results to the nearest whole number

Explanation / Instructions

  1. Enter your values into Old Width and Old Heightrespectively.
  2. Enter one of the values of New Width or New Height.
  3. The missing value will be calculated automatically.
  4. You can change all values at any time, the calculation updated automatically.

Formula

You have a photo or video that is 2400 x 3000 pixels in resolution, but you'd like to send a file that is only 400px in width to your client for review. To calculate the new height of your photo you can use the following formula (or the calculator above):

(org. height / org. width) x new width = new height

With the example numbers above, this would be the calculation:

(2400 / 3000) x 400 = 320

Resolutions & Aspect Ratios for Social Media

Instagram

You should always check and be aware of the fact, that on your Instagram Feed, people will only see the center square (1:1) part of the photo post, video post, and IGTV upload.

Group
Name
Width
Height
Aspect Ratio
Photo Post
Portrait
4:5
1080px
1350px
Square
1:1
1080px
1080px
Landscape
1.91:1
1080px
608px
Video Post
Portrait
4:5
1080px
1350px
Square
1:1
1080px
1080px
Landscape
1.91:1
1080px
608px
Story Post
Portrait
9:16
1080px
1920px
Landscape
1.91:1
1080px
608px
Live
9:16
1080px
1920px
IGTV
Portrait
9:16
1080px
1920px
Landscape
16:9
1920px
1080px
IGTV Cover
4:5
1080px
1350px
Other
Profile Photo
1:1
180px
180px

Resolutions & Aspect Ratios for Filmmaking

Name
Width
Height
Aspect Ratio (convention)
Aspect Ratio (decimal)
Pixels
NTSC
640px
480px
4/3
1.333
307,200
DV NTSC
720px
480px
3/2
1.500
345,600
DV PAL
720px
576px
5/4
1.250
414,720
HDTV 720
1280px
720px
16/9
1.777
921,600
HDV 720
1280px
720px
16/9
1.777
921,600
HDTV 1080
1920px
1080px
16/9
1.777
2,073,600
HDV 1080
1440px
1080px
4/3
1.333
1,555,200
UltraWide FHD
2560px
1080px
21∶9
2.333
2,764,800
2K Academy
1828px
1332px
457/333
1.372
2,434,896
2K Full Aperture
2048px
1536px
4/3
1.333
3,145,728
DCI 2K (full frame)
2048px
1080px
1.90/1
1.90
2,211,840
4K UHD-1
3840px
2160px
16/9
1.777
8,294,400
4K Academy
3656px
2664px
457/333
1.372
9,739,584
DCI 4K (full frame)
4096px
2160px
1.90/1
1.90
8,847,360
4K Full Aperture
4096px
3072px
4/3
1.333
12,582,912
Ultra-Wide QHD
3440px
1440px
21∶9
2.333
4,953,600
WQUXGA
3840px
2400px
16/10
1.60
9,216,000
Ultra-Wide 4K
3840px
1600px
21∶9
2.333
6,144,000
5K
5120px
2880px
16/9
1.777
14,745,600
Ultra-Wide 5K
5120px
2160px
21∶9
2.333
11,059,200
6K
6144px
3160px
1.94
19,415,040
8K UHD-2
7680px
4320px
16/9
1.777
33,177,600
DCI 8K (8K Full Format)
8192px
4320px
1.90/1
1.90
35,389,440
Ultra-Wide 10K
10240px
4320px
21∶9
2.333
44,236,800
16K
15360px
8640px
16/9
1.777
132,710,400

A list of more common resolutions can be found on WikiPedia.