Aspect Ratio Crop Calculator
Reviewed by Hamza Gujjar, Algorithm Architect & Software Developer
Last updated: July 27, 2026Aspect Ratio Crop Calculator
Planning a crop for print or social media? This calculator finds the largest possible crop at your chosen aspect ratio without upscaling.
Fit the largest rectangle at the target ratio inside the original image dimensions
Example
A 6000 x 4000px photo, cropping to 1:1 (square):
Crop to 4000 x 4000 px
Why Planning Crops Ahead of Time Helps
Knowing your maximum available crop dimensions before editing helps you compose and frame shots with enough margin around the subject, rather than discovering during editing that an important part of the image falls outside your target ratio's crop area.
Common Aspect Ratios and Their Uses
1:1 is Instagram's classic square format, 4:5 is Instagram's current preferred portrait format, 3:2 matches standard DSLR/mirrorless sensor output and common print sizes, and 16:9 matches widescreen video and most digital displays.