Golden Ratio Calculator Pro

Know one side, get the other instantly! Or enter both sides to detect the ratio. 12 built-in ratios plus your own saved custom ratios. Result copied automatically.

I made Golden Ratio Calculator Pro for one very specific moment: you are deep in a layout, canvas, frame or screen design, you know one side, and you just want the other number without stopping to do math.

Type in width or height, pick a ratio, and the app gives you the matching value right away. Already have both dimensions? Switch to Detect Ratio and the app tells you the exact ratio plus the closest named preset.

Choose from 12 built-in presets grouped by category — mathematical ratios like Golden, Silver and Bronze, photography standards like 3:2 and A-Paper, or video formats like 16:9, 21:9 and Cinema Scope. If none of those fit, dial in your own custom ratio with the slider or type it in directly. Save any custom ratio with a name and reuse it whenever you need it.

The rectangle preview updates as you go, the color shifts with the ratio, and the calculated value is copied to the clipboard automatically. Small thing. Surprisingly lovely when you do this often.

FEATURES • Calculate width or height instantly from a chosen ratio • Detect Ratio mode: enter both dimensions to identify the ratio and closest named preset • 12 built-in presets grouped by Mathematical, Photography & Print, and Video & Film • Presets include Golden, Silver, Bronze, Yamato, Square, A-Paper, Photo 3:2, Super 16, HD Video 16:9, Ultrawide 21:9, Cinema Scope and Old Television • Save, name, and reuse your own custom ratios • Enter any custom ratio with the slider or direct input • Live visual preview of the proportion you are working with • Flip orientation with one tap • Automatically copy the calculated result to the clipboard • Choose between 0 and 5 decimal places • Home Screen Quick Actions for Golden, Silver, Bronze and Yamato • Spotlight search for the built-in named ratios • Supports light and dark appearance • Works on iPhone and iPad

Speed up your design workflow today. Download Golden Ratio Calculator to get perfect proportions in seconds!