Aspect Ratio Calculator
Calculate and convert aspect ratios instantly. Enter dimensions, use common presets, or find a missing dimension with lock mode.
| Name | Width | Height | Megapixels |
|---|---|---|---|
| 320w | 320 | 180 | 0.06 MP |
| 480w | 480 | 270 | 0.13 MP |
| nHD | 640 | 360 | 0.23 MP |
| 720w | 720 | 405 | 0.29 MP |
| FWVGA | 854 | 480 | 0.41 MP |
| 960w | 960 | 540 | 0.52 MP |
| 1024w | 1024 | 576 | 0.59 MP |
| HD | 1280 | 720 | 0.92 MP |
| HD+ | 1366 | 768 | 1.05 MP |
| WXGA+ | 1440 | 810 | 1.17 MP |
| WUXGA+ | 1600 | 900 | 1.44 MP |
| Full HD | 1920 | 1080 | 2.07 MP |
| QHD | 2560 | 1440 | 3.69 MP |
| 4K UHD | 3840 | 2160 | 8.29 MP |
How to use this tool
- 1Enter dimensions
Type the width and height in pixels. The tool instantly calculates and simplifies the aspect ratio.
- 2Use quick presets
Click a common ratio button (16:9, 4:3, 1:1, etc.) to set dimensions instantly. The visual preview updates in real time.
- 3Find missing dimensions
Use the pixel calculator to lock a ratio and enter one dimension. The tool calculates the other dimension for you.
Why aspect ratios matter
Video and streaming
YouTube, Netflix, and social platforms each expect specific aspect ratios. Using the wrong ratio means your video gets letterboxed or cropped, losing visual impact and screen real estate.
Photography and print
Standard print sizes like 4x6, 5x7, and 8x10 each have different aspect ratios. Knowing your image ratio before printing prevents unexpected cropping of important parts of the frame.
Responsive web design
CSS aspect-ratio property and padding-bottom hacks depend on knowing exact ratios. Maintaining consistent ratios across breakpoints prevents layout shifts and improves Core Web Vitals.
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