Aspect Ratio Cheat Sheet
Every aspect ratio worth knowing, with the exact pixel sizes for each one — screen, photography, print, social and cinema. Every row links to a calculator, and every size opens the bulk resizer already set to it.
Every aspect ratio worth knowing, with the exact pixel sizes for each one — screen, photography, print, social and cinema. Every row links to a calculator, and every size opens the bulk resizer already set to it.
The ratios you meet on screens, in cameras and at the print lab. Sizes are exact — every pair divides cleanly to the ratio beside it.
| Ratio | As a decimal | Common sizes | Calculator |
|---|---|---|---|
| 16:9 | 1.78 | 640x360 , 960x540 , 1024x576 , 1200x675 | Calculator for 16:9 |
| 4:3 | 1.33 | 640x480 , 800x600 , 1024x768 , 1600x1200 | Calculator for 4:3 |
| 3:2 | 1.50 | 1200x800 , 1620x1080 , 1800x1200 , 2160x1440 | Calculator for 3:2 |
| 4:5 | 0.80 | 1080x1350 , 1200x1500 , 2160x2700 , 720x900 | Calculator for 4:5 |
| 9:16 | 0.56 | 360x640 , 450x800 , 540x960 , 576x1024 | Calculator for 9:16 |
| 11x17 | 0.65 | 792x1224 , 1100x1700 , 1650x2550 , 2200x3400 | Calculator for 11x17 |
| 8.5x11 | 0.77 | 612x792 , 850x1100 , 1275x1650 , 1700x2200 | Calculator for 8.5x11 |
| 1:1 | 1.00 | 1080x1080 , 1200x1200 , 2000x2000 , 3000x3000 | Calculator for 1:1 |
| 3:4 | 0.75 | 600x800 , 768x1024 , 900x1200 , 1080x1440 | Calculator for 3:4 |
| 2:3 | 0.67 | 4000x6000 , 2667x4000 , 1200x1800 , 2400x3600 | Calculator for 2:3 |
| 21:9 | 2.33 | 2560x1080 , 3440x1440 , 5120x2160 , 2560x1097 | Calculator for 21:9 |
| 5:4 | 1.25 | 3000x2400 , 1280x1024 , 2560x2048 , 4500x3600 | Calculator for 5:4 |
| 2:1 | 2.00 | 2048x1024 , 3840x1920 , 1500x750 , 1200x600 | Calculator for 2:1 |
Film ratios are written as a decimal against 1 rather than as two whole numbers, which is why they look different from everything above. 2.39:1 is what most people mean when they say "cinematic".
| Ratio | Name | Where you meet it | Sizes |
|---|---|---|---|
| 1.37:1 | Academy ratio | Films from 1932 to the mid-1950s. Still used deliberately — The Lighthouse, First Reformed. | 1920x1401 2048x1495 |
| 1.43:1 | IMAX film | True IMAX 70mm. Only visible in full on a real IMAX screen; everywhere else it is cropped. | 1920x1343 4096x2864 |
| 1.66:1 | European widescreen | Standard European theatrical ratio through the 1960s-80s. Also the native shape of Super 16mm. | 1920x1157 2048x1234 |
| 1.85:1 | US theatrical (flat) | The most common theatrical ratio in America. Nearly every non-scope cinema release. | 1998x1080 (DCI 2K Flat) 3996x2160 (DCI 4K Flat) 1920x1038 |
| 2.20:1 | 70mm | Todd-AO and other 70mm formats. 2001: A Space Odyssey, Lawrence of Arabia. | 1920x873 2048x931 |
| 2.35:1 | CinemaScope (pre-1970) | Anamorphic scope as specified before 1970. Often used loosely to mean any scope ratio. | 1920x817 2048x872 |
| 2.39:1 | Modern anamorphic scope | The current scope standard, in force since 1970. What people usually mean by "cinematic". | 2048x858 (DCI 2K Scope) 4096x1716 (DCI 4K Scope) 1920x803 |
| 2.76:1 | Ultra Panavision 70 | The widest format ever used commercially. Ben-Hur, The Hateful Eight. | 1920x696 2560x928 |
Put a wider frame inside a 1080p timeline and the leftover height splits evenly top and bottom. This is the arithmetic nobody publishes.
| Ratio | Image area | Bars |
|---|---|---|
| 1.85:1 | 1920x1038 | 21px top and bottom |
| 2.00:1 | 1920x960 | 60px top and bottom |
| 2.20:1 | 1920x873 | 103.5px top and bottom |
| 2.35:1 | 1920x817 | 131.5px top and bottom |
| 2.39:1 | 1920x803 | 138.5px top and bottom |
| 2.76:1 | 1920x696 | 192px top and bottom |
16:9 for anything on a screen — television, YouTube, monitors, phones held sideways. 4:3 ruled until the mid-2000s and still shows up on tablets and security cameras. For still photography it is 3:2, inherited from 35mm film, and for social media it is 4:5 or 9:16 depending on whether you are posting to a feed or a full-screen story.
A specification change in 1970. Both are anamorphic scope, and the difference is about 10 pixels of height on a 1920-wide frame — 817 versus 803. Films before 1970 are genuinely 2.35:1; everything since is 2.39:1, though the industry kept saying "2.35" out of habit. If someone asks for "2.35" today they almost always mean 2.39.
Divide the width by the height. 1920 divided by 1080 is 1.778, which is 16:9. To get the ratio in whole numbers, find the greatest common divisor of both sides and divide each by it — for 1920x1080 that is 120, giving 16:9. The calculators linked throughout this page do it for you.
4:5 at 1080x1350 for feed posts, because it is the tallest shape the feed will show without cropping and so takes up the most screen. 9:16 at 1080x1920 for Stories and Reels. 1:1 at 1080x1080 if the same image also has to work as a thumbnail somewhere else.
No, though it is sold as one. 1366 divided by 16 is 85.375 while 768 divided by 9 is 85.33. True 16:9 at that height would be 1365.33 pixels wide, which is not a whole pixel, so laptop panels rounded up. The same applies to 854x480. Both are close enough to look right and wrong enough to leave a hairline bar if you letterbox against them.
4:3 by default on most phones, because that is the native shape of the sensor. Hold the phone upright and you get 3:4 — 3024x4032 on an iPhone, 3000x4000 on many Android flagships. The 16:9 and 1:1 options in your camera app are crops of that same 4:3 sensor, so choosing them throws pixels away.
Reading a number off this page and typing it somewhere else is the step most people skip. Every size above is a link that opens the resizer already set to it.
Social media aspect ratios
Platforms crop silently, so these are the shapes to match before you upload rather than after.