Aspect Ratio Calculator
Calculate aspect ratios and scale dimensions proportionally. Use presets or enter custom values.
Aspect Ratio: 16:9
Decimal: 1.7778
How to Use
- 1Enter the width and height to calculate the aspect ratio.
- 2Or select a preset ratio and enter one dimension to find the other.
- 3View the simplified ratio and decimal value.
- 4Use the resize mode to calculate dimensions for scaling while preserving ratio.
Frequently Asked Questions
What is an aspect ratio?
An aspect ratio is the proportional relationship between an image or screen's width and height, expressed as two numbers separated by a colon. For example, 16:9 means the width is 16 units for every 9 units of height.
What is the most common video aspect ratio?
16:9 (widescreen) is the standard for HD and 4K video, YouTube, and most modern TVs. Other common ratios include 4:3 (classic TV), 21:9 (ultra-wide cinema), and 9:16 (vertical mobile video).
How do I maintain aspect ratio when resizing?
Lock the aspect ratio and change only one dimension (width or height). The tool automatically calculates the other dimension to maintain the original proportions, preventing distortion.