Authoritative definitions of the International System of Units and SI prefixes.
Dedicated unit pair
Tesla to Millitesla
Convert T to mT instantly, then review the formula, assumptions, and rounding guidance.
Magnetic unitsInstant result
Decimals
Formula result = input × 1 ÷ 0.001. 1 T = 1,000 mT
Common examples
One value, several units
Millitesla1,000 mT
Microtesla1,000,000 µT
Gauss10,000 G
Conversion table
| T | mT |
|---|---|
| 1 T | 1,000 mT |
| 2 T | 2,000 mT |
| 5 T | 5,000 mT |
| 10 T | 10,000 mT |
| 25 T | 25,000 mT |
| 50 T | 50,000 mT |
| 100 T | 100,000 mT |
Conversion chart
1 T1,000 mT
5 T5,000 mT
10 T10,000 mT
25 T25,000 mT
50 T50,000 mT
Worked example
1 tesla equals exactly 10,000 gauss.
Unit definition
Tesla (T) One tesla equals 1 tesla.
Unit history
The tesla, named for Nikola Tesla, was adopted as the SI unit of magnetic flux density.
Step by step
1. Parse the value, including fractions.
2. Convert T to tesla.
3. Convert the base value to mT and apply your display precision.
Understand the result before using it
Tesla to Millitesla converts a value measured in Tesla (T) into the equivalent value in Millitesla (mT). The numerical value changes because the size and definition of the selected unit changes; the underlying quantity does not.
Calculated result
The conversion follows the displayed unit relationship. Display rounding can hide additional digits, and measured inputs cannot become more accurate merely by changing units.
Formula, assumptions, and example
Formula
result = input × 1 ÷ 0.001
Assumptions
- Tesla and Millitesla represent the same magnetic flux density quantity.
- The input is expressed in T; the output is expressed in mT.
- The unit definitions and conventional relationship shown on this page apply.
Worked example
1 T = 1,000 mT. For another value, apply the same relationship and round only to the precision your source measurement supports.
When to use it
Good uses
- Read a T measurement in a document that expects mT.
- Compare a tesla value with a value reported in millitesla.
- Check the T-to-mT arithmetic before copying the result into another calculation.
Limitations
Common mistakes to avoid
- Do not confuse T with another unit that has a similar name or symbol.
- Round the output to a precision justified by the original measurement.
- Verify safety-critical, regulated, laboratory, and contractual conversions against the controlling standard.
Sources and further reading
These references explain the underlying standards or provide authoritative context. Your own contract, institution, clinician, product documentation, local code, or governing standard may be the controlling source.
Guidance on unit names, symbols, conversions, and numerical presentation.
Questions about this calculation
How do I convert Tesla to Millitesla?
result = input × 1 ÷ 0.001 Using the displayed relationship, 1 T equals 1,000 mT.
How many Millitesla are in one Tesla?
One Tesla is 1,000 Millitesla. The displayed digits may be rounded.
Can I reverse the T to mT conversion?
Yes. Swap the source and target units in the converter. The reverse relationship converts mT back to T.
Is the Tesla to Millitesla result exact?
The conversion follows the displayed unit relationship. Display rounding can hide additional digits, and measured inputs cannot become more accurate merely by changing units.