Line Height Calculator
Calculate recommended line-height for a font size for optimal readability.
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Tool guide
Line Height Calculator: how it works
Practical information to understand the result and use this tool correctly.
About Line Height Calculator
Calculate recommended line-height for a font size for optimal readability.
The tool runs directly in the browser for immediate results.
How to use it
- 1Enter the values you want to calculate or process.
- 2The result updates instantly on the same page.
- 3Copy, share, or export the result if the tool allows it.
Frequently asked questions
- Do I need to sign up?
- No. The tool works without an account.
- Are my data uploaded?
- Compatible operations run locally in the browser.
- What is a good line-height?
- For body text a ratio of 1.5 is widely recommended for readability. Headings usually use 1.2–1.3.
- Can I use it with rem?
- Yes. The tool shows both the unitless ratio and the computed px value. Convert your rem to px using the root font size (normally 16px).