How to use the 1080x1350 Aspect Ratio
Start from this size
Width and height are already filled in for this frame.
Change width or height
Change the width or the height. The other numbers update as you type.
Read the size and copy
The line under the form shows 4:5 beside the pixel size.
| Scale | Size | MP | |
|---|---|---|---|
| 25% | 270×338 | 0.0913 | |
| 50% | 540×675 | 0.3645 | |
| 75% | 810×1013 | 0.8205 | |
| 100% | 1080×1350 | 1.458 | |
| 150% | 1620×2025 | 3.2805 | |
| 200% | 2160×2700 | 5.832 |
What is the 1080x1350 aspect ratio?
1080×1350 simplifies to 4:5. The decimal is 0.8:1 and the pixel count is 1.458 megapixels. Orientation is portrait.

4:5 is a named standard on this site.
Instagram portrait 4:5 is listed for instagram feed. The source below is the document that names this frame.
How it differs from nearby sizes
Half scale is 540×675 (0.3645 MP). Double scale is 2160×2700 (5.832 MP). Both keep 4:5.
For contrast, 1920×1080 (Full HD (1080p)) is a different shape or density.
Print size at 300 DPI is 3.6 × 4.5 inches. Inches are pixels divided by DPI.
Typical uses
Instagram portrait 4:5 shows up in instagram feed. 1080×1350 stays 4:5 when both sides scale. Phone models are omitted unless a manufacturer page states the pixels.
Open the calculator on this size to read 4:5, or to set one side and get the other in pixels.
Frequently asked questions
Is 1080x1350 equal to 4:5?
Yes, after the greatest common divisor. The two sides divide by 270.
How many megapixels is it?
1.458 MP.
What is a smaller 4:5 size?
540×675 is half on each side.
Can I print it?
Inches = pixels ÷ DPI. At 300 DPI that is 3.6 × 4.5 in.