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Aspect Ratio Calculator

Select common ratios or enter your own to calculate the pixel dimensions for your images or videos through this calculator.

Common Ratios:

Height (W₁):

Width (H₁):

Height (W₂) (Optional):

Width (H₂) (Optional):

Note: Enter either W₂ or H₂ to find the other, or, left both inputs empty.

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An online aspect ratio calculator allows you to determine the pixel dimensions and aspect ratios of videos and images. You can also convert dimensions while maintaining the same ratio using this aspect ratio converter. Learn how to calculate aspect ratios and typical screen sizes below.

What is Aspect Ratio?

The ratio of width to height of a screen is called the aspect ratio, typically represented as two numbers separated by a colon, e.g., 16:9. In an aspect ratio x:y, the screen is x units wide and y units high. Ratios are simplified to their smallest form for proper display. Common aspect ratios include:

3:2 for still cameras
16:9 and 4:3 for TVs
1.85:1 and 2.39:1 for films

How to Calculate Aspect Ratio?

To calculate aspect ratio manually, divide width by height. To resize while keeping the same ratio, use a scaling factor derived from the new height. Example:

Step 1: Take the original width and height

Width = 1920

Height = 1080

Step 2: Divide height by width

1080 / 1920 = 0.5625

Step 3: Multiply quotient by new height

0.5625 × 400 = 225

New width = 225 pixels

Additionally, an online PPI Calculator can help determine dots per inch (DPI), pixels per inch (PPI), and overall display size.

How to Calculate the Screen Size?

Formulas for screen height, width, and area:

Ratio (r) = x / y

Height (h) = \( \dfrac{y * d} {\sqrt{x^2 + y^2}} \)

Width (w) = \( \dfrac{x * d} {\sqrt{x^2 + y^2}} \)

Area (A) = \( \dfrac{x * y * d^2} {x^2 + y^2} \)

Typical Screen Sizes and Aspect Ratios

Name	Aspect Ratio	Width (pixels)	Height (pixels)
480p	3:2	720	480
576p	5:4	720	576
720p	16:9	1280	720
1080p	16:9	1920	1080
2160p (4K UHD)	16:9	3840	2160
4320p (8K UHD)	16:9	7680	4320
SVGA	4:3	800	600
WSVGA	~17:10	1024	600
XGA	4:3	1024	768
WXGA	16:9	1280	720
HD+	16:9	1600	900
FHD	16:9	1920	1080

For easier calculations, use an online Ratio Calculator to determine equivalent ratios by entering three of the four values of two ratios.

How Does the Aspect Ratio Calculator Work?

Input:

Select a common ratio or enter custom width and height.
Enter the new width or height to calculate.
Click “Calculate Aspect Ratio.”

Output:

New Height / Width
New Dimensions
Pixels
Mode
Visual Aspect Ratio

FAQs:

What is the aspect ratio for a Facebook Profile?

Profile picture: 1:1, recommended 128 × 128 pixels

Cover photo: 19:6, recommended 820 × 461 pixels

What is anamorphic?

An anamorphic image is a widescreen picture on 35 mm film using a non-standard aspect ratio, typically 2.4:1, giving a wider cinematic field while cropping the top and bottom.

What is the best aspect ratio for prints?

For prints, 2:3 is common. Examples include 24 × 36 inches or 40 × 60 inches for posters and canvases.

Conclusion:

Use this online aspect ratio calculator to verify dimensions when resizing videos or images. Maintaining the correct aspect ratio ensures proper display and proportional resizing.

References:

Wikipedia: Current Video Standards & Aspect Ratios
Technopedia: Aspect Ratio Meaning
MasterClass: Common Aspect Ratios for Social and Web

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