Magnetic Flux Density ConverterFree online other calculator — instant results, no sign-up
Convert standard magnetic flux density units.
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About the Magnetic Flux Density Converter
The Magnetic Flux Density Converter converts magnetic flux density between tesla, gauss, and millitesla. It expresses the same magnetic field quantity in a different unit without changing its physical magnitude. With the default inputs, 1 tesla converts to 1,000 millitesla.
- Value
- Enter the magnetic flux density in the unit selected under From; the default value is 1.
- From
- Select the input unit—tesla (T), gauss (G), or millitesla (mT)—with tesla selected by default.
- To
- Select the output unit—millitesla (mT), gauss (G), or tesla (T)—with millitesla selected by default.
Formula and method
B_out = B_in × (k_from / k_to), where k_tesla = 1, k_gauss = 0.0001, and k_millitesla = 0.001. For the default inputs: B_out = 1 × (1 / 0.001) = 1,000 millitesla.
- B_inThe numerical magnetic flux density value entered in the From unit.
- B_outThe numerical magnetic flux density result expressed in the To unit.
- k_fromThe number of tesla per unit of the selected From unit.
- k_toThe number of tesla per unit of the selected To unit.
- k_tesla, k_gauss, k_milliteslaThe conversion factors to tesla: 1 T per tesla, 0.0001 T per gauss, and 0.001 T per millitesla, respectively.
Multiply the input value by its conversion factor to express it in tesla, then divide by the destination unit's conversion factor. The unit relationships are exact: 1 tesla = 1,000 millitesla = 10,000 gauss.
Worked example
These are the calculator's starting values and the results it actually produces for them.
Inputs
- Value1
- Fromtesla
- Tomillitesla
Results
- Result1,000 millitesla
How to use the Magnetic Flux Density Converter
- 1Enter 1 in Value to follow the default worked example.
- 2Select tesla under From.
- 3Select millitesla under To.
- 4Read the Result: 1,000 millitesla, which represents the same magnetic flux density as the original 1 tesla.
Reading your result
The Result row gives the converted numerical value followed by the selected destination unit. For the default inputs, Result = 1,000 millitesla. The larger number reflects the smaller size of the millitesla unit, not an increase in the physical magnetic flux density.
Limitations
This tool only converts magnetic flux density B among tesla, gauss, and millitesla. It does not convert magnetic flux in webers or magnetic field strength H in amperes per meter; relating B to H requires information about the medium. Conversion factors are exact, but input measurement uncertainty and any display rounding still affect the reported precision. A converted value alone does not establish whether magnetic exposure is safe.
Common questions
Why does 1 tesla become 1,000 millitesla?+
The prefix milli means one-thousandth, so a millitesla is 0.001 tesla. Dividing 1 tesla by 0.001 tesla per millitesla gives 1,000 millitesla.
How do gauss and millitesla relate?+
One gauss equals 0.0001 tesla, while one millitesla equals 0.001 tesla. Therefore, 1 millitesla equals 10 gauss.
Can this calculator convert tesla to webers?+
No. Tesla measures magnetic flux density, while the weber measures magnetic flux. Computing flux requires the field distribution and surface geometry; for a uniform field perpendicular to a flat surface, flux equals magnetic flux density multiplied by area.
Does the material affect the conversion between tesla and gauss?+
No. Tesla and gauss express the same quantity, so their unit conversion does not depend on the material. Material properties matter when relating magnetic flux density B to magnetic field strength H, which is a different calculation.
Does the calculator save my information?+
Calculations run in your browser. While signed in, inputs and results are automatically recorded in account history; saving a result creates a separate saved record.
Further reading
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Results are estimates for informational purposes and are not financial, medical or legal advice.