Understanding teslas to milliteslas Conversion
The tesla (T) is the SI unit of magnetic flux density, and the millitesla (mT) is one-thousandth of a tesla. Milliteslas are the natural scale for medium-strength fields such as small permanent magnets, magnetic separators, and transcranial magnetic stimulation devices, where values fall between a few and a few hundred millitesla. Converting teslas to milliteslas keeps such measurements in convenient whole numbers rather than small decimals.
Conversion Formula
To convert teslas to milliteslas, multiply by this factor:
Step-by-Step Example
Convert 25 teslas to milliteslas.
How to Convert teslas to milliteslas
A tesla value converts to milliteslas with a simple scale-up.
- Take the tesla value: For example, a 0.5 T separator magnet.
- Multiply by one thousand: Because 1 T equals 1,000 mT, multiply your number by 1,000.
- Give the millitesla result: The value now appears in the finer millitesla unit.
- Worked result: 25 T becomes 25 × 1,000 = 25,000 mT.
teslas to milliteslas conversion table
| teslas (T) | milliteslas (mT) |
|---|---|
| 0 | 0 |
| 1 | 1000 |
| 2 | 2000 |
| 3 | 3000 |
| 4 | 4000 |
| 5 | 5000 |
| 6 | 6000 |
| 7 | 7000 |
| 8 | 8000 |
| 9 | 9000 |
| 10 | 10000 |
| 15 | 15000 |
| 20 | 20000 |
| 25 | 25000 |
| 30 | 30000 |
| 40 | 40000 |
| 50 | 50000 |
| 60 | 60000 |
| 70 | 70000 |
| 80 | 80000 |
| 90 | 90000 |
| 100 | 100000 |
| 150 | 150000 |
| 200 | 200000 |
| 250 | 250000 |
| 300 | 300000 |
| 400 | 400000 |
| 500 | 500000 |
| 600 | 600000 |
| 700 | 700000 |
| 800 | 800000 |
| 900 | 900000 |
| 1000 | 1000000 |
| 2000 | 2000000 |
| 3000 | 3000000 |
| 4000 | 4000000 |
| 5000 | 5000000 |
| 10000 | 10000000 |
| 25000 | 25000000 |
| 50000 | 50000000 |
| 100000 | 100000000 |
| 250000 | 250000000 |
| 500000 | 500000000 |
| 1000000 | 1000000000 |
What is the Tesla?
The tesla is the SI derived unit of magnetic flux density (also called magnetic B-field or magnetic induction). It quantifies the strength of a magnetic field and is used throughout physics, electrical engineering, and medical imaging.
Definition
One tesla is the magnetic flux density of a uniform field that produces a flux of one weber through an area of one square metre perpendicular to the field.
In SI base units, . Equivalently, one tesla is the field in which a charge of one coulomb moving at one metre per second perpendicular to the field feels a force of one newton: .
Origin and History
The unit is named after Nikola Tesla (1856–1943), the inventor and electrical engineer whose work on alternating current and induction motors shaped modern power systems. The name was adopted by the General Conference on Weights and Measures (CGPM) in 1960, when the tesla was formally added to the SI.
Law and Notable Facts
The tesla is a large unit; most everyday magnetic fields are far weaker. Its non-SI counterpart, the gauss, equals exactly tesla and is still common in some fields. The strongest continuous magnetic fields produced in laboratories reach around 45 T, while pulsed magnets briefly exceed 1000 T.
Real-World Examples and Conversions
- Earth's surface magnetic field is roughly 25–65 microteslas (0.25–0.65 gauss).
- A typical clinical MRI scanner operates at 1.5 T or 3 T.
- A strong neodymium refrigerator-type magnet produces around 0.1–1 T at its surface.
- 1 T = 10,000 gauss = 1000 millitesla = 1,000,000 microtesla.
What is the Millitesla?
The millitesla is a decimal submultiple of the tesla, the SI unit of magnetic flux density. It is a convenient scale for describing moderately strong magnetic fields such as those near permanent magnets and small electromagnets.
Definition
One millitesla is one thousandth of a tesla.
In SI base units, . Because one gauss equals tesla, one millitesla equals exactly 10 gauss, a relation that makes the millitesla especially handy when translating between SI and legacy CGS field measurements.
Origin and History
The millitesla inherits its name from Nikola Tesla via the tesla, adopted into the SI in 1960, combined with the standard SI prefix "milli" (one thousandth), introduced in the metric system's prefix scheme. It became a practical working unit as magnetic measurements standardized on SI in the later 20th century.
Law and Notable Facts
As a coherent SI submultiple, the millitesla is fully sanctioned for scientific and engineering use. Many benchtop laboratory magnets, magnetic separators, and material-testing fields fall naturally in the tens-to-hundreds of millitesla range, bridging the gap between weak ambient fields and the multi-tesla fields of MRI or research magnets.
Real-World Examples and Conversions
- A small solenoid or relay coil field is often a few millitesla.
- A typical hard-disk or speaker magnet produces a few hundred millitesla near its poles.
- Earth's field of about 50 microtesla equals 0.05 mT.
- 1 mT = 0.001 T = 10 gauss = 1000 microtesla.
Frequently Asked Questions
How many milliteslas are in one tesla?
There are 1,000 milliteslas in one tesla, because the prefix "milli" means one thousandth.
What kind of magnet produces a field of a few hundred millitesla?
Strong neodymium permanent magnets and MRI gradient coils commonly work in the hundreds-of-millitesla range.
How do I convert a 0.3 T magnet to milliteslas?
Multiply 0.3 by 1,000 to get 300 mT.
Why use milliteslas instead of teslas?
Milliteslas avoid awkward decimals for fields below one tesla, which is where many magnetic devices operate.
Is a millitesla stronger than a gauss?
Yes. One millitesla equals 10 gauss, so it represents a considerably stronger field than a single gauss.
People also convert
Complete teslas conversion table
| Unit | Result |
|---|---|
| milliteslas (mT) | 1000 mT |
| microteslas (uT) | 1000000 uT |
| gauss (G) | 10000 G |
| milligauss (mG) | 10000000 mG |