How to convert Points to CSS millimetres
mm = pt × 0.352777777777778
Multiply the pt reading by 0.352777777777778.
Worked examples
12 pt ≈ 4.233333333 mm
12 × 0.352777777777778 ≈ 4.233333333
Font basis for this example: element 16 px; root 16 px.
72 pt ≈ 25.4 mm
72 × 0.352777777777778 ≈ 25.4
Font basis for this example: element 16 px; root 16 px.
Frequently asked questions
Which font or display assumption applies?
em and rem depend on the specified font context. CSS absolute units have fixed relationships to reference pixels, which do not necessarily equal physical display pixels.