Image Dimensions Calculator

Calculate scaled image dimensions while holding the aspect ratio.

Dimension settings

Original dimensions

Width

Height

Changing either value resets the new size back to 100%.

New dimensions

Width

Height

Type into either box — the other follows the original aspect ratio.

Common presets

Visual preview

1920 × 1080

16:9

Original: 1920 × 1080 px
New: 1920 × 1080 px

Aspect ratio information

16:9

Ratio

1.778

Aspect

width ÷ height

Landscape

Orientation

56.3%

Percentage

height ÷ width

Calculated in your browser — nothing is uploaded and nothing is sent to the server. Enter the original dimensions, then adjust either new value to see the proportional change. Percentage is height ÷ width, the padding-bottom figure for a CSS aspect-ratio box.