Line Height Calculator
Find a comfortable line height for any font size.
Quick answer: enter your details below and click Calculate Line Height — your result appears instantly, right here in your browser. Nothing you enter is uploaded or stored.
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Enter your details below.
How to use
- Enter the font size in pixels.
- Enter a line-height ratio, such as 1.5.
- Click Calculate Line Height.
About this tool
Give a font size and a line-height ratio, and the tool returns the line height in pixels and as a unitless multiple. Comfortable body text usually sits between 1.4 and 1.6, while large headings can sit tighter.
Frequently asked questions
What ratio works for headings?
Headings can sit tighter, around 1.1 to 1.25, because they are short and large.
Why use a unitless ratio?
A unitless value scales with the font size, so it stays proportional if the size changes.