Line Height Calculator

Line Height Calculator

Used for px/em conversions when not using clamp.
Recommended: unitless for responsive scaling.
Auto-calculates unitless: linePx ÷ fontPx.
Optional: Fluid Font Size (clamp)
If min and max are equal, a fixed font-size is used.
Unitless: 1.5000
Pixels (at current base/clamp): 24.00px
EM (equivalent): 1.5000em
Complete CSS Rules:
.element {
/* Recommended */
line-height: 1.5;
}

/* If you insist on absolute value at current base/clamp: */
.element {
line-height: 24px;
}
💡 Quick Presets:
📊 At Different Viewports (Line Box in px):
📱 Mobile (375px): —
📱 Tablet (768px): —
💻 Desktop (1440px): —
Live Preview (Resize browser to see clamp effect):
Lorem ipsum dolor sit amet, consectetur adipisicing elit. Amet, ab. Line-height previewed here with your settings.
Current window width: —

Line Height Calculator 

Line height (also called leading) is the vertical space between lines of text. In CSS, it determines how much breathing room text has above and below each line. A good line height improves readability, accessibility, and overall design flow.

For example:

p {

  font-size: 16px;

  line-height: 1.5; /* 24px total line height */

}

Here, 1.5 means the line height is 150% of the font size.

Why Use a Line Height Calculator?

Choosing the right line height isn’t guesswork — it depends on your font size, content type, and readability goals. A calculator helps you:

  • Quickly find the ideal line height for any font size.
  • Maintain consistent typography across a design system.
  • Improve user experience and accessibility.
  • Save time compared to manual calculations.

How to Use the Calculator

  1. Enter your font size in px, rem, or em.
  2. Choose a line-height multiplier (commonly 1.4–1.6).
  3. The calculator shows you the exact pixel line height.
  4. Copy the CSS output for direct use.

Example Output:

body {

  font-size: 16px;

  line-height: 1.5; /* 24px line height */

}

Recommended Line Heights

Font Size (px)Line Height (1.4)Line Height (1.5)Line Height (1.6)
14px19.6px21px22.4px
16px22.4px24px25.6px
18px25.2px27px28.8px
20px28px30px32px

(Adjust based on font style and design context.)

Best Practices for Line Height

  • Body text: 1.4–1.6× the font size (improves readability).
  • Headings: 1.1–1.3× for compact, bold titles.
  • Small text: Slightly larger (1.6–1.8×) to improve clarity.
  • Large text blocks: Use more spacing for comfortable reading.

FAQs

What is the default line height in browsers?
Most browsers use normal (~1.2) as the default line height if not specified.

Should I use unitless or px values for line height?
Unitless values (like 1.5) are preferred since they scale naturally with font size.

Is line height the same as leading?
Yes. In traditional typography, “leading” refers to the same concept of spacing between lines.

What’s the best line height for accessibility?
WCAG guidelines recommend at least 1.5× the font size for body text.

Can line height affect design aesthetics?
Absolutely. Proper line height balances white space, reduces clutter, and enhances the visual flow of content.