Aspect Ratio & Resolution Calculator

Calculate width-to-height ratios and proportional pixel dimensions. Try 16:9, 9:16, 4:5 and other presets with a visual size preview.

When to use this tool

• Plan proportional dimensions for video frames or social-post images.

How to use

1. Enter positive width and height values.
2. Optionally select a resolution preset.
3. Review the ratio or scaled dimensions.

Examples

Input: Original 1920 × 1080, target width 1280

Result: Ratio 16:9; proportional height 720

Before you start

• The table plans pixel dimensions; no image or video is cropped or converted. The 2560 × 1080 preset is commonly labeled 21:9, but its exact reduced ratio is 64:27.

Frequently asked questions