Weber Wb

SI Derived UnitMagnetic flux
SymbolWb
SystemSI Derived Unit
QuantityMagnetic flux
Value in SI1 Wb = 1 V·s = 1 kg·m²·s⁻²·A⁻¹
Defined / adopted1948 (9th CGPM)

About the Weber

The weber is the magnetic flux that, falling uniformly to zero in one second, induces one volt in a single-turn loop around it. It is named after Wilhelm Weber and equals 10⁸ maxwells in the CGS system.

Related Units

Henry

H
SI Derived UnitInductance

1 H = 1 Wb/A = 1 kg·m²·s⁻²·A⁻²

A circuit has an inductance of one henry when a current changing at one ampere per second induces one volt. It is named...

Tesla

T
SI Derived UnitMagnetic flux density

1 T = 1 Wb/m² = 1 kg·s⁻²·A⁻¹

The tesla measures magnetic flux density and is named after Nikola Tesla. One tesla equals 10,000 gauss, the older CGS...

Gauss

G
CGSMagnetic flux density

10⁻⁴ T (exact)

The gauss is the CGS unit of magnetic flux density, exactly 10⁻⁴ tesla. It is named after Carl Friedrich Gauss. Fridge...

Hertz

Hz
SI Derived UnitFrequency

1 Hz = 1 s⁻¹

The hertz is one cycle or event per second and replaced the older expression cycles per second. It is named after...