⌘Technology calculator

Aspect Ratio Calculator

Simplest aspect ratio and the matching height for a new width.

Enter width, height and new width and get aspect ratio and height at new width instantly.

InWidthInHeightInNew widthOutAspect ratioOutHeight at new widthOutDecimal ratio
3 inputs3 resultsFree no signupPrivate in your browser

Aspect Ratio Calculator

Fill in the values and the answer updates as you type.

Live
1 Your numbers
px
px
px
2 Your result

How the Aspect Ratio Calculator works

Divide both sides by their greatest common divisor to get the simplest ratio. 1920 × 1080 simplifies to 16:9. The new height keeps the same proportions: new width × height ÷ width.

Inputs and results

The Aspect Ratio Calculator takes 3 inputs and gives 3 results.

What you enter

  • Width (px) — starts at 1920.
  • Height (px) — starts at 1080.
  • New width (px) — starts at 1280.

What you get

  • Aspect ratio
  • Height at new width
  • Decimal ratio

Example: Aspect Ratio Calculator with the starting values

With width 1920 px, height 1080 px and new width 1280 px, the calculator returns:

Example results
Aspect ratio16:9
Height at new width720
Decimal ratio1.78

Change any value above and the results update straight away.

Aspect Ratio Calculator FAQ

How do I use the Aspect Ratio Calculator?

Enter width, height and new width in the fields, then read aspect ratio, height at new width and decimal ratio in the result panel. The answer updates as you type, and you can press Calculate or Enter to refresh it. Use “Copy link” to share your exact numbers with someone else.

What does the Aspect Ratio Calculator calculate?

Simplest aspect ratio and the matching height for a new width. It returns aspect ratio, height at new width and decimal ratio from the 3 values you provide.

What values does the Aspect Ratio Calculator start with?

It opens with width 1920 px, height 1080 px and new width 1280 px so you can see a working result straight away. Replace them with your own numbers, or press Reset to return to these starting values.

Is the Aspect Ratio Calculator free and private?

Yes. It is free, needs no account, and runs in your browser, so nothing you type is sent to or stored on our servers. See the Privacy Policy for details.

Can I rely on the Aspect Ratio Calculator for important decisions?

Treat the result as a well-rounded estimate. Real situations often have details a general calculator cannot know, so confirm important decisions with a qualified professional. See the Disclaimer for more.