What is a 5:4 aspect ratio?

A 5:4 aspect ratio means the width is 1.25 times the height. For every 5 units of width there are exactly 4 units of height. Common 5:4 resolutions include 1280x1024 and 2560x2048.

Is 5:4 the same as 4:3?

No. A 4:3 ratio has a width-to-height ratio of 1.333, while 5:4 is 1.25. The 5:4 frame is closer to square than 4:3.

What monitors use 5:4?

Many older CRT monitors and some professional LCD panels use 5:4. The most common resolution is 1280x1024 (SXGA), which is a native 5:4 display.

How does the "nearest 5:4" conversion work?

The calculator averages the width-derived and height-derived 5:4 dimensions to find a best-fit resolution, then rounds to the nearest pixel.

Can I use this for non-pixel units?

Yes. The ratio is unitless, so you can enter centimeters, inches, or any other unit and the result will be in the same unit.

5:4 Aspect Ratio Calculator

Name: 5:4 Aspect Ratio Calculator
Availability: InStock
Author: Nham Vu

Enter a width or height to instantly get the matching 5:4 dimension, or convert any custom size to the nearest 5:4 equivalent.

Calculate from Width

Width

Calculate from Height

Height

Convert Custom Size to Nearest 5:4

Width

Height

5:4 Ratio Preview

5:4

width (5)

height (4)

Width = Height × 1.25 | Height = Width × 0.8

Common 5:4 Resolutions

Resolution	Name	Megapixels
640 x 512	—	0.33 MP
1280 x 1024	SXGA	1.31 MP
1600 x 1280	—	2.05 MP
2560 x 2048	QSXGA	5.24 MP
5120 x 4096	—	20.97 MP

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Summary

Enter a width or height to instantly get the matching 5:4 dimension, or convert any custom size to the nearest 5:4 equivalent.

How it works

Select whether you know the width or the height.
Enter your known dimension in pixels (or any unit).
The calculator multiplies or divides by the 5/4 ratio to produce the missing dimension.
Use the "Convert custom size" section to enter both dimensions and find the nearest 5:4 equivalent.
Copy any result with one click.

Use cases

Set up a 5:4 monitor (e.g. 1280x1024) to confirm exact pixel counts.
Crop photos to a 5:4 frame for a classic photographic look.
Design UI layouts that must fit 5:4 display hardware.
Find the closest 5:4 resolution when downscaling a 4:3 or 16:9 source.
Verify that a custom crop in a photo editor maintains 5:4 proportions.
Calculate canvas sizes for digital illustrations with a 5:4 constraint.

Frequently Asked Questions

Last updated: 2026-06-09 · Reviewed by Nham Vu