Free Typography Tools
Characters-per-line Checker
Estimate line length from container width, font size, and average glyph width.
What this tool does
Estimate whether a text column is too narrow or too wide.
The checker estimates line capacity from container width, font size, and average glyph width.
Because real fonts and words vary, the result is a design signal rather than an exact typesetting measurement.
Use the tool
Estimate text measure
Enter the layout dimensions and preview representative copy inside the selected width.
Container and type measurements
This is an estimate. Actual line length depends on the font, weight, tracking, language, and words used.
Estimated measure
68 characters
per line, based on an average glyph width
Readable measure makes long-form copy easier to scan and reduces the effort of finding the next line.
How to use it
Three quick steps
- 1Enter the available text width and font size.
- 2Adjust the average glyph factor if the chosen face is unusually narrow or wide.
- 3Confirm the result with the actual font, weight, and copy.
Worked example
Review an article column
Estimate 600px of 16px body copy using a 0.5em average glyph.
FAQ
Questions about the characters-per-line checker
Practical details about using the tool and understanding its result.
Keep working
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