Line-height ratio
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
font × ratio
About this calculator
The Line-height ratio calculator helps determine the ideal line height of text in relation to font size. This is crucial for ensuring readability and aesthetics of text. The ideal proportion varies according to text type: for body text, a ratio of 1.2 to 1.5 is recommended, while for headings, a ratio of 1.1 to 1.2 is more suitable.
The formula used is simple: just multiply the font size by the desired ratio. For example, if you have a 12pt font and want a ratio of 1.3, the line height would be 12 * 1.3 = 15.6pt. This measurement directly influences the ease of reading and the visual appearance of the text.
It's essential to consider the type of font and the context in which it will be used. Generally, higher ratios improve readability but can affect text density. Very low ratios can make reading difficult, especially in long texts.
When using this calculator, it's crucial to keep in mind the care in choosing the font and ratio to ensure the result is pleasant and easy to read.
Frequently asked questions
What is line-height ratio?
It's the relationship between line height and font size, crucial for text readability and aesthetics.
What are the ideal ratios for body text and headings?
For body text, 1.2 to 1.5 is recommended, and for headings, 1.1 to 1.2.
How to calculate line height?
Multiply the font size by the desired ratio.
Why is font choice important?
The font influences readability and text appearance, affecting how the line-height ratio is perceived.
What happens if the line-height ratio is too low?
It can make reading difficult, especially in long texts.