Aspect Ratio Calculator
Calculate aspect ratios, resize dimensions while maintaining proportions, and find equivalent resolutions.
Calculate Aspect Ratio
16:9
Resize by Width
Resize by Height
Common Resolutions
About Aspect Ratio Calculator
This free online aspect ratio calculator lets you calculate aspect ratios, resize dimensions while maintaining proportions, and find equivalent resolutions — directly in your browser with no signup or installation required.
Features: Instant results, works entirely client-side (your data never leaves your browser), mobile-friendly, and completely free to use.