Video Aspect Ratio Calculator — Dimensions
Calculate video dimensions for common aspect ratios with pixel-perfect even numbers.
How We Calculate This
Height Calculation
Height = width ÷ (ratio width ÷ ratio height)
The height is rounded to the nearest whole pixel, then rounded up to the nearest multiple of your Pixel Alignment (default 2) so the dimensions stay codec-friendly. For example, 16:9 at 3840px wide gives 3840 ÷ (16÷9) = 2160px, which is already even — exactly 4K UHD.
Frequently Asked Questions
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Last updated: February 2026
All calculations are estimates based on standard optical and photographic formulas. Results may vary with specific equipment.