About Aspect Ratio Calculator
Find reduced aspect ratios (3:2, 4:3, 1:1, 16:9, 5:4) for photography and compute proportional pixel dimensions without image distortion.
Key Capabilities & Features
- Greatest Common Divisor (GCD) reduction to canonical photographic ratios (3:2, 4:3, 1:1, 16:9, 5:4, 6:7)
- Proportional dimension scaler maintaining exact aspect geometry
- Identifies standard camera formats and printing paper matches
- Instant one-click copy of scaled dimensions
How to Use Aspect Ratio Calculator
1
Input Original Dimensions
Type your image width and height in pixels.
2
Inspect Ratio
View the simplified photographic ratio and standard sensor match.
3
Scale Proportionally
Enter a new target width to calculate the proportional height.
Privacy & In-Browser Execution Guarantee
100% client-side calculation. Your image dimensions stay private in your browser.
Frequently Asked Questions
Why is 3:2 the standard DSLR and mirrorless aspect ratio?
The 3:2 ratio originates from Oskar Barnack's 1913 Leica 35mm film format (36x24mm), which became the international photographic standard.
Why does an 8x10 print crop a 3:2 photo?
An 8x10 print has an aspect ratio of 5:4 (1.25:1), whereas 3:2 is 1.5:1. Printing a 3:2 full frame photo on 8x10 requires trimming roughly 16% off the long edges.