Aspect Ratio Calculator
Calculate new dimensions while maintaining the same aspect ratio.
Runs entirely in your browser
Source Dimensions
Ratio:
Common Presets
Calculate New Size
New Dimensions
Calculate new dimensions while maintaining the same aspect ratio.
Source Dimensions
Common Presets
Calculate New Size
New Dimensions
Resize while keeping the same proportions.
Enter your source width and height, or pick a preset ratio.
Enter a new width or height to calculate the other dimension.
The matching dimension is calculated instantly to preserve the ratio.
Results update instantly as you type -- no button needed.
All calculations happen locally in your browser.
Quick buttons for 16:9, 4:3, 1:1, 21:9, 3:2, and 9:16 ratios.
Just open the page and start calculating. No sign-ups or logins.