Aspect Ratio Calculator
Calculate width, height, or ratio for any aspect ratio. Enter two values and the third is computed automatically — useful for scaling responsive images, sizing video embeds, and planning UI layouts without distortion.
Solve for
Common Presets
Detect ratio from image
Drop an image here or browse
PNG, JPG, WebP, SVG, GIF…
Common Aspect Ratios
- 16:9 — widescreen video, monitors, YouTube thumbnails.
- 4:3 — classic TV, old presentations, some tablet screens.
- 1:1 — square format, Instagram posts, profile photos.
- 9:16 — mobile portrait, TikTok, Instagram Stories/Reels.
- Use the CSS property
aspect-ratio: 16 / 9to lock proportions in responsive layouts without JavaScript. - Aspect ratio = width ÷ height — 1920×1080 = 16:9 (1920 ÷ 1080 = 1.777...).
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