Technology
Image cover crop
Calculate a centred cover crop that fills a target rectangle while preserving image proportions.
Calculators / Technology / Aspect ratio resize
Aspect ratio resize calculator
Resize a frame to a new width while preserving its width-to-height ratio.
On this page
Width to height ratio1.78
Proportional target height607.5px
Scale factor0.56
Calculator controls
How to calculate
Resize a frame to a new width while preserving its width-to-height ratio.
Width to height ratio =
width/heightProportional target height =
target*height/width pxScale factor =
target/widthWorked example
- Source width (px): 1920
- Source height (px): 1080
- Target width (px): 1080
- Width to height ratio: 1.78
- Proportional target height: 607.5 px
- Scale factor: 0.56
Assumptions and limits
The target height may be fractional before display rounding. This preserves proportions; it does not crop, resample or add image detail.
Results are rounded for display; calculations use unrounded values. Read our calculation methodology.
Understanding the result
Resize a frame to a new width while preserving its width-to-height ratio. A 1920-by-1080 landscape frame resized to 1080 wide becomes 607.5 high. Choose a pixel rounding rule for your export.
When this tool is useful
A 1920-by-1080 landscape frame resized to 1080 wide becomes 607.5 high. Choose a pixel rounding rule for your export.
Understanding your inputs
| Input | Example |
|---|---|
Source width (px) width | 1920 |
Source height (px) height | 1080 |
Target width (px) target | 1080 |
Frequently asked questions
What assumptions should I check?
The target height may be fractional before display rounding. This preserves proportions; it does not crop, resample or add image detail.
How can I check the result?
Start with the labelled example. Keep units consistent, calculate without intermediate rounding and change one input at a time. The diagram explains the model; the result table supplies the numerical answer.