Image resize calculator

How to use it

Calculate the proportional target height and scale percentage from original image dimensions and a target width. No image file is modified.

1. Enter original width and height in pixels.
2. Enter the target width.
3. Select Calculate to see target dimensions and scale percentage.

Target height

target width × original height ÷ original width, rounded

Displayed width

Target width rounded to a whole pixel

Scale

target width ÷ original width × 100

Input

All dimensions must be positive

4000×3000 resized to width 1600 becomes 1600×1200

This page only calculates dimensions. Use the Image resizer tool when you need to create a resized image file.