Font Size Calculator
Convert between pixel, point, em, rem, and percentage values for perfect typography across devices
Font Size Conversion
Used for em, rem, and % conversions
Font Size Conversions
Pixels (px)
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Points (pt)
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Ems (em)
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Rems (rem)
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Percentage (%)
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Enter your font size to check accessibility compliance.
Visual Comparison
Your font sizes will appear here for visual comparison.
📝 Typography Standards
| Element | Minimum Size | Recommended Size | WCAG Compliance |
|---|---|---|---|
| Body Text | 16px (12pt) | 18px (13.5pt) | AA |
| Headings (h1) | 24px (18pt) | 32px (24pt) | AA |
| Headings (h2) | 20px (15pt) | 24px (18pt) | AA |
| Buttons | 16px (12pt) | 18px (13.5pt) | AA |
| Captions | 14px (10.5pt) | 16px (12pt) | AA |
| Mobile Body | 14px (10.5pt) | 16px (12pt) | AA |
| Accessibility (AAA) | 18px (13.5pt) | 21px (16pt) | AAA |
Note: These are general guidelines. Actual requirements may vary based on font family and contrast ratios.
🎨 Typography Best Practices
Readability First
Prioritize legibility over aesthetics. Even beautiful typography fails if users can't read it comfortably.
Responsive Typography
Use relative units (em, rem) or viewport units (vw) for fonts that scale across devices.
Contrast Matters
Ensure sufficient contrast between text and background (minimum 4.5:1 for normal text).
Line Length
Aim for 45-75 characters per line for optimal reading comfort.
Vertical Rhythm
Use consistent vertical spacing based on your baseline grid for harmonious layouts.
Font Loading
Optimize web fonts to prevent layout shifts and ensure text remains visible during loading.
Dark Mode
Note: This calculator provides approximate conversions based on standard assumptions (1em = 16px by default). Actual rendering may vary slightly depending on browser, operating system, and font family.