What this tool is for
Font metrics / safe line height
Find a comfortable line-height starting point. The aim is a useful result without making you learn a full piece of software first.
Free · No sign-up · PrivateType, Layout & Effects
Find a safer line height.
Preview body copy at a chosen font size and line-height multiplier.
Type metrics
Preview
46.4px line box
The quick brown fox jumps over the lazy dog. 0123456789 The quick brown fox jumps over the lazy dog. 0123456789
This uses the browser’s rendered font family. If the font is not installed, the browser falls back.
Before you finish
A quick check makes a better result.
OutMonkey is built to be simple enough for someone doing this once and useful enough for someone who does it every day.
Good to know
Treat the maths as a starting point.
Look at the result at the size it will really be used. Fonts have different proportions, so spacing that is mathematically neat can still look too tight or too loose.
Typography is partly optical. If two settings are close, choose the one that is easier to read rather than the one with the tidier number.
In plain English
You do not need to be an expert.
Designers can use the numbers as a fast baseline. Everyone else can simply compare the previews and choose the version that is easiest to read and looks balanced.
Type maths gives you structure; the final judgment should still be optical.