THE NUMORIX GUIDE
How to use the Magnetic Field Converter
Last reviewed September 14, 2026
What this calculator does
The converter normalizes magnetic flux density to tesla and divides by each destination factor.
Formula and method
The converter normalizes magnetic flux density to tesla and divides by each destination factor. It uses 1 mT = 0.001 T, 1 gauss = 0.0001 T, 1 microtesla = 1e-6 T, and 1 milligauss = 1e-7 T. The page reports each unit from the same scalar base value.
Variables and inputs
Enter a numeric magnetic-field value and choose Tesla, Millitesla, Gauss, Microtesla, or Milligauss. The page recalculates immediately, shows tesla as the headline value, and formats the breakdown to six decimal places. It does not specify field direction or whether the value is B or H.
Worked example
For 1 millitesla, the base value is 1 x 0.001 = 0.001 T. That equals 10 gauss, 1,000 microtesla, and 10,000 milligauss under the engine factors.
How to interpret the result
Tesla and gauss describe magnetic flux density, commonly written B. The conversion preserves only the magnitude; it does not describe field direction, spatial variation, magnetic field strength H, or the force on a particular charge or material.
Common mistakes to avoid
Do not use 1 tesla = 1,000 gauss; the correct relationship is 1 tesla = 10,000 gauss. Track milli versus micro carefully, and do not substitute a B-field value for H-field units such as ampere per meter without a material model.
Assumptions and limitations
The calculator is a scalar unit conversion and does not model permeability, field geometry, gradients, shielding, frequency, exposure, or sensor calibration. It accepts numeric values without a physical-range check, and fixed six-place formatting may hide small values in tesla.
Practical use and checks
The Magnetic Field Converter changes field strength among tesla, millitesla, gauss, microtesla, and milligauss. Enter 1 tesla as a check; the outputs should be 1 T, 1,000 mT, 10,000 G, 1,000,000 microtesla, and 10,000,000 milligauss. Entering 50 microtesla should return 0.00005 T and 0.5 gauss, which is a practical scale check for a weak ambient field. The quantity is being represented differently, not measured more accurately. Keep the unit attached to the result and distinguish magnetic flux density B from magnetic field strength H, since they are not interchangeable quantities in every material. The converter applies fixed unit factors only; it does not model distance from a magnet, coil geometry, current, permeability, direction, spatial gradients, frequency, or sensor calibration. Negative values can encode a field component along a chosen axis, but a scalar magnitude is normally nonnegative, so clarify what the sign means. Very small values may be displayed with rounding that hides meaningful digits. For a magnet, MRI, motor, or exposure decision, record the measurement location, vector direction, frequency content, instrument range, and whether the specification calls for B or H instead of treating a unit conversion as a field analysis.