Aspect Ratio Calculator
Calculate, compare, and convert between aspect ratios. Work out scaling, letterboxing, and pillarboxing for mixed-resolution content on projectors and LED walls.
Identify & Scale
Enter a resolution to find its aspect ratio, or enter one dimension and an aspect ratio to calculate the other.
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Quick presets
Aspect Ratio
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Decimal
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Total Pixels
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Orientation
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Fit, Crop & Letterbox
See how source content fits within a target display. Shows whether letterboxing, pillarboxing, or cropping is required.
Source
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Target Display
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Fit (Contain)
Scaled to
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Scale %
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Bars
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Fill (Crop)
Scaled to
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Scale %
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Cropped
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Common Aspect Ratios
| Ratio | Decimal | Common Resolutions | Typical Use |
|---|---|---|---|
| 16:9 | 1.778 | 1920×1080, 3840×2160 | HD / UHD broadcast, most projectors |
| 16:10 | 1.600 | 1920×1200, 2560×1600 | WUXGA projectors, Mac displays |
| 4:3 | 1.333 | 1024×768, 1400×1050 | Legacy projectors, older displays |
| 21:9 | 2.333 | 2560×1080, 3440×1440 | Ultrawide, cinematic LED walls |
| 1:1 | 1.000 | 1080×1080 | Square LED screens, social media |
| 9:16 | 0.563 | 1080×1920 | Portrait displays, digital signage |
| 17:9 | 1.889 | 4096×2160 | DCI 4K cinema |
| 2.39:1 | 2.390 | 4096×1716 | Anamorphic widescreen cinema |
| 32:9 | 3.556 | 3840×1080 | Dual-screen blends, super-ultrawide |