Tesla (T)
The tesla is the SI unit of magnetic flux density (B), equal to one weber per square metre. The Earth’s field is about 50 µT; a fridge magnet about 5 mT; an MRI scanner 1.5–3 T.
Symbol: T
Quantity: magnetic flux density (B field)
SI relation: T is the coherent SI unit of magnetic flux density.
Derivation: 1 T = 1 Wb/m² = 1 kg/(s²·A), the SI unit of magnetic flux density
Exact: yes, by definition
History
Named after Nikola Tesla; adopted by the General Conference on Weights and Measures in 1960.
Typical uses
- MRI scanners (1.5 T and 3 T)
- Permanent magnets and motors
- Electromagnet and transformer core design
Convert tesla to other units
| Conversion | 1 T equals | Reverse |
|---|---|---|
| tesla to gauss | 10000 G | gauss to tesla |
| tesla to millitesla | 1000 mT | millitesla to tesla |
| tesla to microtesla | 1000000 µT | microtesla to tesla |
| tesla to milligauss | 10000000 mG | milligauss to tesla |
| tesla to nanotesla | 1000000000 nT | nanotesla to tesla |
| tesla to kilogauss | 10 kG | kilogauss to tesla |
Open the Magnetic Flux Density 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). Tesla (T). Retrieved October 25, 2026, from https://scientificconverters.com/units/tesla/
IEEE
Scientific Converters, "Tesla (T)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/units/tesla/