Line Height Calculator — Perfect CSS Line Spacing

Quickly calculate ideal line height based on font size. Adjust line spacing, preview how it looks, and copy CSS code with unitless, px, rem, or em options.

Line Height Input
Font Size (px)
Line Height
Computed Line Height: 1.5
ToolMateX is a growing suite of developer utilities. This preview demonstrates the line height visually with your chosen settings.
CSS Output
1
2

Why Line Height Matters

Proper line spacing improves readability, balance, and visual rhythm in your typography. Whether you're building UI or writing content, this tool helps you find the right fit.

Use Cases

  • 📄 Designing readable paragraphs and articles
  • 🧱 Balancing spacing in headings and labels
  • 🔍 Accessibility fine-tuning
  • 📐 Applying precise typography rules in your CSS

CSS Output

The calculator gives you a font-size and a line-height that you can copy-paste directly into your stylesheet.

Frequently Asked Questions (FAQs)

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