Weber (Wb)
The weber is the SI unit of magnetic flux (Φ): the flux that induces one volt in a single-turn loop when it falls to zero in one second. Flux = flux density × area, so 1 Wb = 1 T·m².
Symbol: Wb
Quantity: magnetic flux
SI relation: Wb is the coherent SI unit of magnetic flux.
Derivation: 1 Wb = 1 V·s = 1 T·m², the SI unit of magnetic flux
Exact: yes, by definition
History
Named after Wilhelm Weber; adopted as an SI unit in 1960.
Typical uses
- Transformer and motor core flux
- Fluxmeter readings
- Electromagnetic induction calculations
Convert webers to other units
| Conversion | 1 Wb equals | Reverse |
|---|---|---|
| weber to milliweber | 1000 mWb | milliweber to weber |
| weber to maxwell | 100000000 Mx | maxwell to weber |
| weber to microweber | 1000000 µWb | microweber to weber |
Open the Magnetic Flux Converter to convert any value between all units.
Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures .
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Weber (Wb). Retrieved October 25, 2026, from https://scientificconverters.com/units/weber/
IEEE
Scientific Converters, "Weber (Wb)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/units/weber/