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4:5 Aspect Ratio Calculator
A moderately tall portrait frame useful for feed-style portrait graphics, editorial imagery and product or campaign creative. Enter a width or height to calculate the matching dimension, or choose a common pixel size below.
Portrait · exact proportion
Calculate 4:5 dimensions
Change either field. The other dimension updates immediately to preserve the selected ratio.
Load a common size
Common 4:5 dimensions
These sizes preserve an exact 4:5 proportion. Select any row to load it into the calculator.
| Dimensions | Common label / use | Action |
|---|---|---|
| 320 × 400 | Small portrait | |
| 640 × 800 | Medium portrait | |
| 1080 × 1350 | Common portrait | |
| 1600 × 2000 | High-resolution portrait |
What does 4:5 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 × 5 ÷ 4. For a known height, width = height × 4 ÷ 5. Keep both dimensions in the same unit.
Where 4:5 is useful
- Portrait social-feed graphics where supported
- Editorial portraits and campaign artwork
- Product imagery composed for a vertical canvas
- Layouts needing more height than a square without becoming full-screen vertical
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 4:5, 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 4:5 mean?
The frame is 4 units wide and 5 units high.
How do I calculate 4:5 height?
Multiply the width by 5 and divide by 4.
Is 1080 × 1350 exactly 4:5?
Yes. Both dimensions divide by 270, giving 4:5.
Explore related tools and ratios
Choose a related ratio or continue to an image tool depending on what you need next.