Border Radius Calculator
An interactive calculator for keeping corners concentric and visually balanced. Change outer radius, padding, or inner radius and get the correct CSS immediately.
Concentric rule inner = outer - padding
Current ratio padding / outer = 0.304
Preview
Quick guide
Border Radius Calculator is an online tool that helps you Compute the inner radius from outer radius and padding, with live preview. Everything lives on a dedicated page, so you can open it again later or share it with a direct link.
This page is linked from the See the full tools index index and from related utilities, which keeps it easy to reach for both users and crawlers. If you need a fast workflow, you can use it immediately without sign-up.
This page keeps readable content, a stable URL, and internal links to other tools on the site. That is the right setup to improve discovery and support long-term organic indexing.
Border Radius Calculator helps you Compute the inner radius from outer radius and padding, with live preview. The result is immediate and the tool runs directly in the browser.
Yes. Border Radius Calculator is available online without payment and without creating an account.
Yes. Border Radius Calculator is designed to open from a direct URL and work online with a simple, immediate interface.
