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16:9 aspect ratio calculator
Use this 16:9 aspect ratio calculator to find the matching width or height for widescreen video. It also covers 9:16 vertical, 1:1 square, 4:3, and 21:9 so you can size canvases, exports, and thumbnails fast.
Pick a preset like 16:9 or 9:16, or type a custom ratio. Common 16x9 sizes include 1920x1080, 1280x720, and 3840x2160. Common 9:16 sizes include 1080x1920 and 720x1280.
The preview box updates as you type so you can see the frame shape before you open an editor. Everything runs in your browser; nothing is uploaded.
Recording product demos on Mac? Glisio exports widescreen, vertical, and square from one recording when you are ready to publish.
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Platform presets
Aspect ratio
1920 × 1080px · 16:9
Formula: height = width × 9 ÷ 16
16:9 in pixels
16:9 in pixels is any size where width ÷ height = 1.778. The most common 16:9 resolutions are 1920×1080 (Full HD 1080p), 1280×720 (HD 720p), 2560×1440 (QHD), and 3840×2160 (4K UHD). To get the height for any width, multiply the width by 9 and divide by 16.
| Resolution (px) | Name | Typical use |
|---|---|---|
| 426×240 | 240p | Tiny previews |
| 640×360 | 360p | Low-bandwidth web video |
| 854×480 | 480p (SD) | Standard definition |
| 1280×720 | 720p (HD) | YouTube HD, thumbnails, lighter exports |
| 1600×900 | 900p (HD+) | Laptop displays |
| 1920×1080 | 1080p (Full HD) | YouTube, product demos, most monitors |
| 2560×1440 | 1440p (QHD) | Gaming and design monitors |
| 3840×2160 | 2160p (4K UHD) | 4K TVs, YouTube 4K |
| 5120×2880 | 5K | Apple Studio Display, 5K iMac |
| 7680×4320 | 4320p (8K) | 8K TVs |
Screen sizes in inches and cm, plus platform sizes: full 16:9 guide.
Common sizes by aspect ratio
16:9 Widescreen
- 426×240
- 640×360
- 854×480
- 1280×720
All 16:9 sizes
9:16 Vertical
- 360×640
- 720×1280
- 1080×1920
- 1440×2560
All 9:16 sizes
1:1 Square
- 600×600
- 1080×1080
- 1200×1200
- 2048×2048
All 1:1 sizes
4:5 Portrait
- 864×1080
- 1080×1350
- 1600×2000
- 2400×3000
All 4:5 sizes
16:10 MacBook widescreen
- 1280×800
- 1440×900
- 1680×1050
- 1920×1200
All 16:10 sizes
4:3 Standard
- 640×480
- 800×600
- 1024×768
- 1600×1200
All 4:3 sizes
21:9 Ultrawide
- 2560×1080
- 3440×1440
- 3840×1600
- 5120×2160
All 21:9 sizes
Aspect ratio calculator FAQ
- How do I calculate an aspect ratio?
- Divide both sides by their greatest common divisor. 1920×1080 divides by 120 to give 16:9. To find a missing side, use height = width × ratio height ÷ ratio width.
- How do I calculate a 16:9 aspect ratio?
- Height = width × 9 ÷ 16. Example: 1920 × 9 ÷ 16 = 1080. Use the calculator above to lock either side.
- What is 16:9 in pixels?
- 1920×1080 (1080p), 1280×720 (720p), 2560×1440 (1440p), and 3840×2160 (4K) are the common 16:9 sizes.
- What size should I use for 9:16 vertical video?
- 1080×1920 is the common export for TikTok, Reels, and Shorts. 720×1280 works when you need a lighter file.
- What is the difference between 16:9 and 16x9?
- Nothing. 16:9 and 16x9 both mean sixteen units wide by nine units tall, the standard widescreen frame.