What are common aspect ratios?

16:9 (HD video, modern displays), 4:3 (old TVs, classic), 21:9 (ultrawide monitors), 1:1 (square, Instagram), 9:16 (vertical video, mobile).

How is aspect ratio calculated?

Aspect ratio is calculated by finding the greatest common divisor (GCD) of width and height, then dividing both by the GCD to get the simplified ratio.

What is the aspect ratio of 1920x1080?

1920x1080 has an aspect ratio of 16:9. This is the standard HD resolution used in most modern displays and videos.

Why is aspect ratio important?

Aspect ratio determines the shape of images and videos. It affects how content is displayed and ensures proper scaling across different screen sizes.

Can I calculate aspect ratio from any dimensions?

Yes, enter any width and height values, and the calculator will determine the aspect ratio and show a visual representation.

What does the decimal ratio mean?

The decimal ratio (e.g., 1.78:1) shows the width-to-height ratio as a single number. 16:9 = 1.78:1, meaning width is 1.78 times the height.

Aspect Ratio Calculator

Calculate aspect ratio from dimensions. Perfect for responsive design and video production.

Aspect Ratio

Width

Height

16:9

(1.78:1)

Conversion Guide

Conversion

R

Calculate Ratio

Ratio = Width : Height

Find GCD of width and height, then simplify

D

Decimal Ratio

Decimal = Width ÷ Height

Shows width-to-height ratio as a number

Step-by-Step Scenario

Example Scenario

Width

1920

Height

1080

1

Find GCD

GCD(1920, 1080) = 120

Calculate greatest common divisor

2

Simplify

1920 ÷ 120 = 16
1080 ÷ 120 = 9

16:9 (1.78:1)

Additional Examples

HD Resolution

Dimensions: 1920x1080

Aspect Ratio

16:9 (1.78:1)

Square Format

Dimensions: 1080x1080

Aspect Ratio

1:1 (1.00:1)

Characteristics of Aspect Ratio

Visual Representation

See a visual preview of the aspect ratio. Helps understand the shape and proportions of the dimensions.

Common Ratios

Recognizes common aspect ratios like 16:9 (HD), 4:3 (classic), 21:9 (ultrawide), and 1:1 (square).

Real-Time Calculation

Calculate aspect ratio instantly as you type. Both simplified ratio and decimal format are shown.

Design Essential

Essential for responsive web design, video production, and ensuring content displays correctly across devices.

Important Notes

Aspect ratio is calculated by finding the greatest common divisor (GCD) of width and height, then simplifying.
The decimal ratio shows width divided by height. For example, 16:9 = 1.78:1 means width is 1.78 times the height.
Common aspect ratios: 16:9 (HD video), 4:3 (classic TV), 21:9 (ultrawide), 1:1 (square), 9:16 (vertical video).
For responsive design, aspect ratio helps maintain proper scaling across different screen sizes.
The visual preview shows the approximate shape of the aspect ratio, helping you understand the proportions.

Frequently Asked Questions

Find answers to common questions about aspect ratio calculation.