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Asked: 2026-06-10T23:17:38+00:00

I saw people using line height without specifying a unit, like this: line-height: 1.5;

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I saw people using line height without specifying a unit, like this: line-height: 1.5;

What does the number represents? I’m guessing it’s a ratio so is it like em?

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  1. Editorial Team

    line-height@ Mozilla Developer Network has a very good explanation (and examples) which is a easier to understand compared to the line-heightCSS specification.

    line-height can have the value specified in one of the following ways

    line-height: normal | <number> | <length> | <percentage>

    In your case, you are using a <number> which is described as:

    The used value is this unitless <number> multiplied by the element’s font size. The computed value is the same as the specified <number>. In most cases this is the preferred way to set line-height with no unexpected results in case of inheritance.

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