Font size
px
Line height
px
Unitless size
0
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What is Line Height?

Line height, also known as leading in typography, determines the vertical space between lines of text. In CSS, it’s a crucial property that affects both readability and overall design aesthetics. The right line height can make your content more engaging and easier to read.

How to Use This Tool

  1. Enter your desired font size in pixels
  2. Adjust the line height value using the slider or input field
  3. Preview your text in real-time with the applied settings
  4. Copy the generated CSS code with a single click

Understanding Line Height Values

Pixel Values

When you set line height in pixels (px), you’re specifying an exact space between lines. For example:

    
line-height: 26px;
    

Unitless Values

Unitless values are multiplied by the element’s font size:

    
line-height: 1.5;
    

This creates proportional spacing that adapts to different font sizes.

Best Practices for Line Height

For Body Text

  • Use values between 1.5 and 1.7 for optimal readability
  • Larger line height for longer text blocks
  • Consider adjusting based on font family characteristics

For Headings

  • Use tighter spacing (1.1 to 1.3)
  • Adjust based on heading size and weight
  • Test readability at different screen sizes

Tips for Perfect Line Height

  1. Consider your font choice – different fonts may need different line height values
  2. Test readability on multiple devices
  3. Adjust line height based on line length
  4. Use relative units for responsive design
  5. Remember accessibility guidelines

Common Line Height Mistakes to Avoid

  • Setting line height too tight, making text hard to read
  • Using fixed pixel values for responsive designs
  • Ignoring font characteristics when setting line height
  • Not testing with different screen sizes

Technical Details

Our line height calculator helps you:

  • Generate precise CSS values
  • Preview text appearance instantly
  • Experiment with different settings
  • Copy code directly to your project

Accessibility Considerations

Proper line height is crucial for accessibility:

  • WCAG guidelines recommend sufficient line spacing
  • Minimum line height of 1.5 for body text
  • Adequate contrast between lines
  • Consistent spacing throughout content

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