Henry (unit)

The henry (symbol H) is the SI unit of inductance. The self- or mutual inductance of a closed loop is 1 henry if a current of 1 ampere gives rise to a magnetic flux of 1 weber.

1 H = Wb/A = 1 V⋅s/A = 1 (J/C)⋅(s/A) = 1 J/A² = 1 N⋅m/A² = kg⋅m²/(s⋅A)²

The henry was adopted in 1893 by the International Electrical Congress.