Convert magnetic flux density (B) between tesla, millitesla, microtesla and gauss.
Magnetism • 7 units
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Magnetic flux density (the "B-field") measures the strength of a magnetic field. Its SI unit, the tesla (T), honours inventor Nikola Tesla and was adopted in 1960; the older CGS unit, the gauss (G), is named after mathematician Carl Friedrich Gauss. The two are linked by a simple factor: 1 tesla = 10,000 gauss.
These units appear everywhere from medicine to industry. MRI scanners are rated in tesla (1.5 T, 3 T, or 7 T for research); loudspeaker and motor magnets, scientific instruments, and hard-drive write heads are often specified in gauss. Because medical and engineering literature mixes both units — and Earth's own field is a fraction of a gauss (about 0.25–0.65 G, or 25–65 µT) — converting between tesla, gauss and microtesla is a routine task.
Quick reference — 1 Tesla (T) is equal to:
| Millitesla | mT | 1,000 |
| Microtesla | µT | 1,000,000 |
| Gauss | G | 10,000 |
| Milligauss | mG | 10,000,000 |
| Kilogauss | kG | 10 |
| Weber/meter² | Wb/m² | 1 |