Factors come from the stored source family and are not derived from rounded display values.
Guides
Typography, CSS pixels and point sizes
px, pt and mm look similar but come from web, print and physical length. The source decides the right interpretation.
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Unit console
Convertir des unités avec formule, contexte et précision
UnitCloud est un laboratoire de mesure local pour le quotidien, la technique, l'informatique, l'énergie, la mobilité et le design.
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Typographie
Fast path
px depends on output context. UnitCloud uses the CSS reference of 96 px per inch.
Search and practice paths
Search and practice paths
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UnitCloud keeps calculating with stored factors and rounds only the displayed output by selected precision.
Do not use as the sole basis for official, medical, safety-critical or contractual decisions.
Citation note: UnitCloud, conversion with formula, sources current as of May 2026. Typographie. Source basis: NIST Guide to SI Appendix B · W3C CSS Values and Units.
Common questions
Are 16 px always 12 pt?
px, pt and mm look similar but come from web, print and physical length. The source decides the right interpretation.
When is CSS px not a physical screen pixel?
px, pt and mm look similar but come from web, print and physical length. The source decides the right interpretation.
What is the factor for CSS pixel en Point?
1 px = 0,75 pt
Which formula does CSS pixel en Point use?
1 px = 0.75 pt at 96 dpi. Then the value is converted through the base unit pt into Point.