What is difference between px and em?

Answer 1

1em=16px

Answer 2

em=px/16

Answer 3

px et % : utilisation pour les blocs et em : utilisation pour les textes

Answer 4

px et % : used for blocs and em : used for textes

Answer 5

Px is for pixel size and em is a default size measurement of font
Px=em*16
Em=16/px

Answer 6

px=1/16em

Answer 7

px=1/16em