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Magnetic Field Converter

Convert between magnetic field strength units: Tesla, milliTesla, microTesla, Gauss, and Oersted.

Magnetic Flux Density (B field)

T1
mT1000
μT1.00000e+6
nT1.0000e+9
G10000
mG1.0000e+7

Magnetic Field Strength (H field)

A/m1
kA/m0.001
Oe0.0125664

B field vs. H field

B (magnetic flux density, in Tesla) and H (magnetic field strength, in A/m) are related by the permeability of the medium: B = μ₀μr H. In free space, 1 Oe ≈ 79.58 A/m and 1 G = 10⁻⁴ T.

Reference Values

Earth's magnetic field25–65 μT
Fridge magnet~5 mT
Neodymium magnet (surface)~1–1.4 T
MRI scanner (clinical)1.5–3 T
Research MRI7–10.5 T
Junkyard electromagnet~1 T

About this tool

Magnetic field strength is measured in various units depending on the context and region—Tesla in the SI system, Gauss in the CGS system, and Oersted for historical or specialized applications. Converting between these units is essential for physicists, electrical engineers, materials scientists, and anyone working with electromagnets, MRI machines, particle accelerators, or magnetic materials. This tool enables instant conversion between Tesla, milliTesla, microTesla, Gauss, and Oersted, eliminating the need for manual calculations.

Simply select your source unit and target unit, enter the magnetic field value you want to convert, and the tool calculates the result immediately. Whether you're designing electromagnetic systems, analyzing experimental data from different laboratories, reading equipment specifications from international manufacturers, or calibrating sensitive instruments, this converter handles all standard magnetic field units with high precision. The interface supports both SI prefixes (milli, micro) and traditional units used across various scientific disciplines.

This tool is particularly valuable for researchers and engineers working across different scientific traditions where unit conventions vary. Physicists studying magnetism, electrical engineers designing transformer coils, medical professionals working with MRI systems, and materials scientists investigating magnetic properties all benefit from quick, accurate conversions. The tool requires no specialized knowledge—simply enter your value and get precise results instantly.

Frequently Asked Questions

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