🧲 Magnetic Field Converter
Convert magnetic flux density (magnetic field) units, tesla, gauss, millitesla, microtesla, milligauss and nanotesla. 1 tesla = 10,000 gauss.
1 T = 1000 mT
1 teslas = 1000 milliteslas
1 × 1000 = 1000
1 T equals 1000 mT, so multiplying by 1000 converts the value. The result describes the exact same quantity, only the measuring stick changes.
Popular magnetic field conversions
All magnetic field units
| Unit | Symbol | Definition |
|---|---|---|
| Tesla | T | The SI unit of magnetic flux density. A fridge magnet is a few millitesla; an MRI scanner runs at 1.5-3 T. Earth's field is only about 50 microtesla. |
| Millitesla | mT | One-thousandth of a tesla (10⁻³ T), equal to 10 gauss. Handy for everyday magnets, which sit in the single-to-hundreds of millitesla range. |
| Microtesla | µT | One-millionth of a tesla (10⁻⁶ T). Earth's magnetic field at the surface is about 25-65 µT, so this unit suits geomagnetic and biomagnetic measurements. |
| Gauss | G | The CGS unit of magnetic flux density, exactly 10⁻⁴ tesla, so 1 T = 10,000 G. Still widely used for magnet ratings and Earth's field (~0.5 G). |
| Milligauss | mG | One-thousandth of a gauss (10⁻⁷ T). EMF meters and power-line field measurements are usually quoted in milligauss. |
| Nanotesla | nT | One-billionth of a tesla (10⁻⁹ T), also called a gamma (γ) in geophysics. Used for small variations in Earth's field and magnetic surveying. |
Frequently asked questions
How do I convert magnetic field units?
Choose your two units in the converter above and type a value, the result updates instantly, entirely in your browser. All 6 magnetic field units on this page are interchangeable, so you can convert in either direction.
Which magnetic field units can I convert here?
This converter supports 6 magnetic field units: Tesla (T), Millitesla (mT), Microtesla (µT), Gauss (G) and 2 more. Pick any two to convert between them.
What is the most common magnetic field conversion?
One of the most-used magnetic field conversions is Teslas to Gauss (T → G). Every magnetic field pair we support is linked below, each with its own formula and table.
Is this Magnetic Field Converter free and private?
Yes. It is free with no sign-up, uses the exact internationally defined conversion factors, and computes every result locally in your browser, nothing you type is uploaded, and the page keeps working offline.