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4:3 Aspect Ratio Calculator
A classic, slightly squarer landscape shape still found in older displays, legacy media, and some presentation or camera workflows. Enter a width or height to calculate the matching dimension, or choose a common pixel size below.
Landscape · exact proportion
Calculate 4:3 dimensions
Change either field. The other dimension updates immediately to preserve the selected ratio.
Load a common size
Common 4:3 dimensions
These sizes preserve an exact 4:3 proportion. Select any row to load it into the calculator.
| Dimensions | Common label / use | Action |
|---|---|---|
| 640 × 480 | VGA | |
| 800 × 600 | SVGA | |
| 1024 × 768 | XGA | |
| 1600 × 1200 | UXGA |
What does 4:3 mean?
An aspect ratio describes the relationship between width and height, not the number of pixels. A smaller and a larger image can have the same ratio when their dimensions scale proportionally.
Formula: height = width × 3 ÷ 4. For a known height, width = height × 4 ÷ 3. Keep both dimensions in the same unit.
Where 4:3 is useful
- Older monitors and legacy display content
- Classic presentation slide formats
- Some camera and photo output settings
- Content designed for a squarer landscape frame
Ratio versus resolution
The ratio describes shape; resolution describes pixel dimensions. A frame can be the right shape but too small for your intended use. Conversely, a high-resolution image can still need cropping if its shape does not match the target.
Resizing without distortion
Scale width and height by the same factor to preserve the source ratio. If the source ratio differs from 4:3, choose between cropping to fill the frame or fitting the whole image with possible empty space. Do not stretch the image unevenly.
Frequently asked questions
What does 4:3 mean?
For every 4 units of width, the frame is 3 units high.
What is a common 4:3 resolution?
640 × 480 and 1024 × 768 are familiar 4:3 resolutions.
Is 4:3 wider than 16:9?
No. 4:3 is relatively squarer; 16:9 is much wider.
Explore related tools and ratios
Choose a related ratio or continue to an image tool depending on what you need next.