Free Web Design Tool
Free Line Height Calculator — Run the numbers in seconds with clear, plain-English results. No signup, no spreadsheets.
Use the Line Height Calculator output in briefs, proposals, or QBRs so every party is working from the same line height instead of a rough guess.
Show the inputs and the math so the line height you're proposing isn't taking on faith. Stakeholders can poke at it before they sign off.
Adjust one input at a time to see how line height moves. It's the fastest way to find the version that's actually worth doing.
Skip the Sheets gymnastics. The Line Height Calculator gives you a clean line height answer in seconds with no formula errors to debug.
Line height (CSS line-height) controls the vertical space between lines of text and is one of the biggest levers in typography. This calculator suggests line-height values for body copy, headlines, and UI text based on your font size.
That's normal. Use ranges. Run the Line Height Calculator with a conservative input and an optimistic input to see the realistic spread of line height you could land in.
The numbers stay on this page. Screenshot the result, or copy the inputs and answer into a doc to share it with a teammate or client.
Yes. The Line Height Calculator output is suitable for proposals, QBRs, and forecasts. We recommend always showing the inputs alongside the number so the client can see how it was built.
Yes. No signup, no limits, no email gate. Use the Line Height Calculator as often as you need.
No. This tool runs entirely in your browser. Nothing you enter is sent to a server, saved, or shared with anyone.
Please do. We're happy for marketers, agencies, and educators to link to this page so their readers can use the Line Height Calculator here.
Want an agency that hits the numbers this tool helps you measure? Suff Digital Web Design & Development