Aspect Ratio Calculator
Calculate dimensions and ratios for video, photos, and responsive design. Free, fast, and runs 100% in your browser.
Maintaining correct aspect ratios prevents images from looking stretched or squashed. This calculator determines missing dimensions when you scale images proportionally. Enter width and height, or select common ratios like 16:9, 4:3, and 1:1, and get the corresponding dimension instantly.
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Aspect Ratio Calculator
Calculate dimensions, convert between ratios, and find matching resolutions for video, photos, and design.
16:9
1.7778
1920×1080
2.07 MP
1920 × 1080
Feature Overview
| Feature | Details |
|---|---|
| Common presets | 16:9, 4:3, 1:1 |
| Custom ratios | ✓ |
| Proportional scaling | ✓ |
| Dimension calculator | ✓ |
| Privacy | 100% client-side |
Frequently Asked Questions
What common ratios are available?
16:9 (widescreen), 4:3 (standard), 1:1 (square), 21:9 (ultrawide), and custom ratios.
Can I calculate from one dimension?
Yes. Enter one dimension and the aspect ratio to calculate the other dimension proportionally.
Is this useful for responsive design?
Absolutely. Calculate dimensions for different breakpoints while maintaining the same aspect ratio.