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4:3 Aspect Ratio Calculator
Work with the 4:3 aspect ratio: enter one dimension and get the other keeping 4:3, or check whether a size matches 4:3. For example 1920 × 1440 is a 4:3 size (4:3 means 4 units wide for every 3 tall). The calculator reduces any width×height to its simplest ratio with the greatest common divisor and solves the missing dimension so images and video keep 4:3 without distortion — all in your browser. Common for photos, print and classic displays.
4:3 means 4 wide for every 3 tall
- Example 4:3 size: 1920 × 1440
- Reduced via gcd; resize keeps the ratio (no distortion)
Frequently asked questions
What dimensions are 4:3?
Any width×height that reduces to 4:3. For example 1920 × 1440 is 4:3. Enter one dimension in the calculator and it returns the other keeping 4:3.
How do I resize to 4:3?
Set the ratio to 4:3, type your new width (or height), and the calculator computes the matching height (or width) so the image keeps 4:3 without stretching.