Aspect Ratio Calculator

Calculate image aspect ratios, find matching dimensions, and resize width or height without changing the proportions.

Calculate aspect ratio

Enter the width and height of your image or video.

Simplified aspect ratio
16:9
Widescreen · 1.778:1

Preview · 1920 × 1080

Find matching dimensions

Use the ratio on the left to calculate a matching width or height.

Calculated dimension
720 px 1280 × 720 pixels · 16:9 ratio

Popular aspect ratios

Select a preset to load its dimensions.

Note: Aspect ratio describes the proportional relationship between width and height. Calculated dimensions may be fractional; rounded pixel dimensions can differ slightly from the exact ratio.