microteslas (uT) to milliteslas (mT) conversion

1 uT = 0.001 mTmT → uT
Formula
1 uT = 0.001 mT

Understanding microteslas to milliteslas Conversion

The microtesla (µT) and millitesla (mT) are both SI submultiples of the tesla, the unit of magnetic flux density. A microtesla is one-millionth of a tesla while a millitesla is one-thousandth, making the millitesla a thousand times larger. This conversion appears when small environmental or biomagnetic fields measured in µT need to be expressed on the mT scale typical of permanent magnets, magnetic separators, and MRI gradient specifications.

Conversion Formula

1 uT=0.001 mT1\ \text{uT} = 0.001\ \text{mT}

To convert microteslas to milliteslas, multiply by this factor:

mT=uT×0.001\text{mT} = \text{uT} \times 0.001

Step-by-Step Example

Convert 25 microteslas to milliteslas.

mT=25×0.001=0.025 mT\text{mT} = 25 \times 0.001 = 0.025\ \text{mT}

How to Convert microteslas to milliteslas

Both are decimal fractions of the tesla, so the conversion is a division by one thousand.

  1. Read the field in microteslas: For example, 25 µT.
  2. Apply the factor: Multiply by 0.001 (divide by 1,000), since 1 µT = 0.001 mT.
  3. Compute: 25 × 0.001 gives the field in milliteslas.
  4. State the result: 25 µT equals 0.025 mT.

microteslas to milliteslas conversion table

microteslas (uT)milliteslas (mT)
00
10.001
20.002
30.003
40.004
50.005
60.006
70.007
80.008
90.009
100.01
150.015
200.02
250.025
300.03
400.04
500.05
600.06
700.07
800.08
900.09
1000.1
1500.15
2000.2
2500.25
3000.3
4000.4
5000.5
6000.6
7000.7
8000.8
9000.9
10001
20002
30003
40004
50005
1000010
2500025
5000050
100000100
250000250
500000500
10000001000

What is the Microtesla?

The microtesla is a decimal submultiple of the tesla, the SI unit of magnetic flux density. It is the natural scale for weak magnetic fields, most notably the Earth's geomagnetic field and stray fields from household wiring and appliances.

Definition

One microtesla is one millionth of a tesla.

1 μT=0.000001 T1\ \mu\text{T} = 0.000001\ \text{T}

In SI base units, 1 μT=10−6 kg⋅s−2⋅A−11\ \mu\text{T} = 10⁻⁶\ \text{kg}\cdot\text{s}^{-2}\cdot\text{A}^{-1}. Since one gauss equals 10−410⁻⁴ tesla, one microtesla equals exactly 10−210⁻² gauss (that is, 10 milligauss), a conversion frequently used in geomagnetism and EMF surveys.

Origin and History

The microtesla combines the tesla, named for Nikola Tesla and adopted into the SI in 1960, with the SI prefix "micro" (one millionth). It rose to prominence as scientists standardized geomagnetic and environmental field measurements on SI units, replacing the older gauss and gamma (1 γ=1 nT1\ \gamma = 1\ \text{nT}).

Law and Notable Facts

The microtesla is a fully coherent SI submultiple. It is the customary unit for reporting the Earth's magnetic field and for public-exposure discussions: international guidelines (ICNIRP) set reference levels for power-frequency magnetic fields on the order of 100–200 microtesla for the general public.

Real-World Examples and Conversions

  • Earth's magnetic field ranges from about 25 microtesla near the equator to 65 microtesla near the poles.
  • Magnetic fields directly beneath high-voltage power lines can reach several microtesla.
  • 1 microtesla = 10 milligauss = 0.01 gauss.
  • 1 microtesla = 0.001 mT = 0.000001 T.

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.

1 mT=0.001 T1\ \text{mT} = 0.001\ \text{T}

In SI base units, 1 mT=10−3 kg⋅s−2⋅A−11\ \text{mT} = 10⁻³\ \text{kg}\cdot\text{s}^{-2}\cdot\text{A}^{-1}. Because one gauss equals 10−410⁻⁴ 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 a microtesla?

One microtesla equals 0.001 millitesla, since there are 1,000 microteslas in every millitesla.

How do I convert microteslas to milliteslas?

Divide the microtesla value by 1,000 (multiply by 0.001). For example, 500 µT equals 0.5 mT.

How do I convert milliteslas back to microteslas?

Multiply the millitesla value by 1,000. So 2 mT equals 2,000 µT.

When would I need this conversion?

Biomagnetic and environmental fields (the Earth's ~50 µT field, for instance) are measured in µT, whereas fridge magnets and lab electromagnets are rated in mT, so µT readings are scaled up to compare.

How strong is 0.025 millitesla?

That is 25 µT, about half the Earth's magnetic field — far weaker than a typical refrigerator magnet, which is roughly 5 mT.

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uT to TuT to GuT to mG

Complete microteslas conversion table

uT
UnitResult
teslas (T)0.000001 T
milliteslas (mT)0.001 mT
gauss (G)0.01 G
milligauss (mG)10 mG

Magnetic flux density conversions