What does a 2:1 aspect ratio mean?

A 2:1 ratio means the width is exactly twice the height. For example, a 1920 px wide image would be 960 px tall.

What common screen sizes use 2:1?

The Samsung Galaxy S8 and LG G6 phones popularized 18:9 (which simplifies to 2:1). Twitter header images (1500 x 750 px) and many panoramic photo crops also use this ratio.

Can I use units other than pixels?

Yes. The calculator works with any consistent unit — inches, centimeters, millimeters, or points — because aspect ratio is a pure number (ratio of two lengths).

How is 2:1 different from 16:9?

16:9 equals roughly 1.78:1, while 2:1 is exactly 2:1. A 2:1 image is slightly wider relative to its height than a standard 16:9 widescreen frame.

What if I need to round to whole pixels?

The result is rounded to the nearest whole number automatically. For perfect integer results, use even numbers as your input width (or multiples of 2 as your height).

2:1 Aspect Ratio Calculator

Name: 2:1 Aspect Ratio Calculator
Availability: InStock
Author: Nham Vu

Enter a width or height and instantly get the matching dimension for a perfect 2:1 aspect ratio.

Calculate Dimension

Width

Enter a dimension above to see the result.

Common 2:1 Sizes

Name	Width	Height
2560 x 1280 (QHD+)	2560	1280
1920 x 960 (FHD)	1920	960
1500 x 750 (Twitter Header)	1500	750
1440 x 720 (HD+)	1440	720
1280 x 640 (Galaxy S8)	1280	640
1200 x 600 (Web banner)	1200	600
1000 x 500	1000	500
800 x 400	800	400
600 x 300	600	300

Click any row to load those dimensions into the calculator.

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Summary

Enter a width or height and instantly get the matching dimension for a perfect 2:1 aspect ratio.

How it works

Choose whether you know the width or the height.
Type your known dimension in pixels (or any unit).
The calculator divides or multiplies by 2 to find the other dimension.
Results update instantly as you type.
Scroll down to see a reference table of common 2:1 sizes.

Use cases

Size a Twitter/X header banner (1500 x 750 px).
Crop panoramic or ultrawide photographs.
Set canvas dimensions for cinematic letterbox video.
Specify billboard or wide-format print dimensions.
Resize hero images for website headers.
Calculate screen dimensions for dual-monitor panoramic setups.
Prepare assets for wide-angle VR or 360-degree previews.
Verify that a custom display or monitor meets a 2:1 ratio.

Frequently Asked Questions

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Last updated: 2026-05-29 · Reviewed by Nham Vu