CSS Border Radius
Calculate CSS Border Radius instantly with the exact formula and a worked example.
CSS Border Radius
Element heightpx
Radius
20px
More about: CSS Border Radius
What it calculates
The “CSS Border Radius” calculator computes Radius in px from 1 parameter: element height (px).
Standard IT calculations for developers and sysadmins.
Example calculation
With parameters Element height = 40 px the result is 20 px.
How to use
- Enter element height — each field above is adjustable with a slider.
- Radius (px) is calculated automatically as you type.
- Check the worked example below to see the formula applied to real numbers.
- Copy the result or bookmark this calculator.
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FAQ
How is CSS Border Radius calculated?
The CSS Border Radius calculator computes Radius (in px) from element height. Enter your values above and the exact formula is applied instantly; a worked example with real numbers is shown below.
Is the CSS Border Radius calculator free?
Yes. It is completely free, needs no signup, runs entirely in your browser, and sends no data to any server.
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