Line Length & Line Height Calculator
Characters per line for a text width – and a matching line height.
Character counts are estimates based on an average character width (sans ≈ 0.5 em). 66ch in CSS uses the real “0” width of your font.
Runs entirely in your browser. Nothing is sent anywhere.
How it works
- 1Paste or type your text.
- 2Choose the options you need.
- 3Copy or download the result.
About this tool
Line Length & Line Height Calculator: Characters per line for a text width – and a matching line height. Paste your text and the result appears immediately, ready to copy or download. Everything happens locally in your browser — nothing you paste is uploaded or stored.
How do I use the Line Length & Line Height Calculator?
Paste or type your text. Choose the options you need. Copy or download the result.
Is the Line Length & Line Height Calculator free?
Yes. It is completely free with no sign-up, no usage limits and no watermark.
Is my data sent to a server?
No. Everything is calculated locally in your browser. Nothing you enter is uploaded, logged or stored.
Does it work on my phone?
Yes. It works in any modern browser on Android, iPhone, iPad, Windows, Mac and Linux — no app needed.