Convert Tesla to Millitesla (T to mT)
1 tesla (T) = 1000 millitesla (mT). 1 mT = 0.001 T. Example: 15 T = 15 × 1000 = 15000 mT.
Also searched as tesla to mT, tesla in mT, tesla into millitesla, T to mT, T in millitesla, T into millitesla, tesla to millitesla, T to millitesla converter and how many millitesla in a tesla.
1 T = 1000 mT
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk tesla to millitesla converter to paste a column from Excel.
How to Convert Tesla to Millitesla
- 1 T = 1000 mT
- 1 mT = 0.001 T
- Example: convert 15 T to mT: 15 T = 15 × 1000 mT = 15000 mT
Formula
mT = T × 1000
Derivation from SI units:
- 1 T = 1 Wb/m² = 1 kg/(s²·A), the SI unit of magnetic flux density
- 1 mT = 10⁻³ T
Both units are defined exactly, so the factor is exact. Tesla definition: tesla; Millitesla definition: millitesla.
Worked examples
- A reading of 0.1 T converts to 100 mT.
0.1 T × 1000 = 100 mT - A value of 1 T is 1000 mT.
1 T × 1000 = 1000 mT
Tesla to Millitesla conversion table
| Tesla (T) | Millitesla (mT) |
|---|---|
| 0.00005 T | 0.05 mT |
| 0.001 T | 1 mT |
| 0.01 T | 10 mT |
| 0.1 T | 100 mT |
| 0.3 T | 300 mT |
| 0.5 T | 500 mT |
| 1 T | 1000 mT |
| 1.5 T | 1500 mT |
| 3 T | 3000 mT |
| 7 T | 7000 mT |
Where it's used
Tesla are used for MRI scanners (1.5 T and 3 T), while millitesla appear in fridge and small permanent magnets (about 5–100 mT). Both measure magnetic flux density (B field), so the conversion is a fixed factor.
Tesla to other magnetic flux density units
| Conversion | 1 T equals |
|---|---|
| tesla to millitesla | 1000 mT |
| tesla to gauss | 10000 G |
| tesla to microtesla | 1000000 µT |
| tesla to milligauss | 10000000 mG |
| tesla to nanotesla | 1000000000 nT |
| tesla to kilogauss | 10 kG |
Frequently asked questions
How many millitesla are in 1 tesla?
1 T = 1000 mT.
How do I convert tesla to millitesla?
Multiply the value in T by 1000. For example, 15 T × 1000 = 15000 mT.
Is the T to mT conversion exact?
Yes. Both units are defined exactly, and 1 T is exactly 1000 mT.
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). Convert Tesla to Millitesla (T to mT). Retrieved October 25, 2026, from https://scientificconverters.com/magnetic-flux-density/tesla-to-millitesla/
IEEE
Scientific Converters, "Convert Tesla to Millitesla (T to mT)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/magnetic-flux-density/tesla-to-millitesla/