Font Size Conversion Formulas
1 pt = 1/72 inch = 0.3528 mm
1 px = 1/96 inch (at 96 DPI) = 0.75 pt
1 em = base font size in px
1 rem = root font size in px
x-height is approximately 0.5x the font size
Font Size Calculator
Convert between font size units (pt, px, em, rem) and calculate line height, x-height, and cap height for optimal typography.
Converted Sizes
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Points (pt)
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Pixels (px)
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Em
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Rem
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Millimeters
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Inches
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Line Height
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x-Height (approx)
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