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Aspect ratio calculator

Find the ratio of a width and height, or the missing side for a ratio such as 16:9.

Width

Height

16:9

Decimal: 1.7778:1
Closest common: 16:9, exactHD video, most screens

1920 × 1080

Ratio

Like 16:9, 2.39:1 or 1.5.

Common ratios

16:94:33:221:91.85:12.39:11:14:59:16

Known side

WidthHeight

Width

Round to even numbers (most video encoders need them)

1280 × 720

Common sizes

640×360
1280×720
1920×1080
2560×1440
3840×2160
7680×4320