Font Size Converter
Convert between px, pt, em, rem, %, and vw font size units. Configurable base font size and viewport width for accurate conversions.
How to Use Font Size Converter
The Font Size Converter transforms font sizes between all common CSS units: pixels (px), points (pt), em, rem, percent (%), and viewport width (vw). Enter a value in any unit and see all equivalent values at once. Configure the base font size (default 16px) for accurate em/rem/% calculations, and set the viewport width for vw conversions. Essential for web developers building responsive designs, converting design specs from pt to px, or migrating from px to rem-based typography. The tool uses standard conversion ratios: 1pt = 1.333px, 1rem = base px, 1% = base/100.
Step-by-Step Instructions
- Enter the font size value and select its unit
- Optionally adjust the base font size and viewport width
- Click Convert to see all equivalent values
- Copy the converted values for your CSS
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