Line-height Calculator

Convert design line spacing (px) to line-height multiplier.

About this tool

This tool converts design leading (px) to line-height multiplier in one click. Three features: 1) Enter font size (px) and desired line spacing (px) for multiplier, 2) Convert design specs to CSS, 3) Useful for typography line spacing design.

Tool interface

line-height (multiplier) —
CSS —

Usage

  1. Enter font size (px) and desired line spacing (px)
  2. line-height multiplier is calculated instantly
  3. Use result for CSS line-height property

When to use

Converting design specs to CSS, typography line spacing.

Examples

16px font, 24px spacing → line-height: 1.5

FAQ

What does unitless line-height mean?

Multiplier of font size. 1.5 = 1.5× font height. Inherits relatively.

Line spacing vs line-height?

Same concept. Design uses 'leading', CSS uses line-height. spacing ÷ font-size = multiplier.

Recommended line-height?

Body 1.5–1.8. Headings 1.2–1.4. This tool converts design leading (px) to multiplier.

How to calculate line-height from px?

Desired line height (px) ÷ font size (px) = multiplier. E.g. 24px ÷ 16px = 1.5.

What is line-height: normal?

Browser default (~1.2). Varies by font. Better to set explicitly.

Typography line spacing tips?

Body 1.5–1.8 for readability. Headings 1.2–1.4. This tool converts px leading to multiplier.

What is design leading?

Line-to-line spacing. In Figma/Illustrator as 'leading'. Convert px to line-height multiplier.

Inherit line-height?

Unitless (1.5) inherits relatively. px is fixed. Prefer unitless for scaling.

Align multi-line text spacing?

Use same line-height multiplier. Consistent visual spacing across font sizes.

How to use line-height calculator?

Enter font size (px) and desired line spacing (px). Get line-height multiplier instantly.

Keywords covered on this page

Line-height Calculator is a free developer tool for searches like Line-height Calculator. Convert design line spacing (px) to line-height multiplier.

Basic workflow

  1. Enter font size (px) and desired line spacing (px)
  2. line-height multiplier is calculated instantly
  3. Use result for CSS line-height property

Practical use cases

  • Converting design specs to CSS, typography line spacing.
  • This tool converts design leading (px) to line-height multiplier in one click. Three features: 1) Enter font size (px) and desired line spacing (px) for multiplier, 2) Convert design specs to CSS, 3) Useful for typography line spacing design.
  • px spacing → multiplier
  • Font size based

Privacy & data handling

Data stays on your device; we do not store it on our servers.

Things to watch out for

  • Always double-check before pasting output into production
  • Try incognito if extensions break the page
  • Wait for processing on large inputs

Related learning content

Frequently asked questions

Is Line-height Calculator free?

Free to use, no sign-up required.

Is data sent to a server?

Data stays on your device; we do not store it on our servers.

Supported browsers?

Tested on recent Chrome, Edge, Firefox, and Safari.

Offline use?

Core features work offline after the first load.

vs CLI or desktop apps?

Line-height Calculator is an install-free online alternative to CLI or desktop apps.

When to use it?

Use it when: Converting design specs to CSS, typography line spacing.

Usage example?

Example: 16px font, 24px spacing → line-height: 1.5

Main features?

px spacing → multiplier, Font size based, Instant calculation

How is this different from similar tools?

Line-height Calculator runs in the browser with no install—ideal for quick checks before heavier CLI or IDE workflows.

Search keywords

Line-height Calculator

Related tools

Tool set

Typography Set