CalcKit
Magnetic Flux Density Converter
Magnetic flux density (B), often just called the magnetic field, is the strength of a magnetic field: the magnetic flux per unit of area it passes through. Its SI unit is the tesla (T), one weber per square meter. The CGS unit, the gauss (G), is still common: 1 T = 10,000 G.
For a sense of scale: the Earth's field is about 25–65 µT (0.25–0.65 G), a fridge magnet about 5 mT, a neodymium magnet's surface about 1 T, and an MRI scanner 1.5–3 T.
How to convert tesla and gauss
Type a value into any field, and every other unit is calculated at once. For example, the Earth's field of 50 µT, which is 0.00005 T:
-
In gauss: multiply by 10,000.
0.00005 * 10,000 = 0.5 G -
In nanotesla, or gammas: multiply by 1,000,000,000.
0.00005 * 1,000,000,000 = 50,000 γ
Common conversions
| Value | Equals |
|---|---|
| 1 T | 10,000 G |
| 1 G | 0.0001 T |
| 1 mT | 10 G |
| 1 G | 100,000 γ |
| 1 Mx/cm² | 1 G |
| 1 Wb/m² | 1 T |
Magnetic flux density units
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Tesla (T): Tesla is the SI unit of magnetic flux density, equal to one Weber per square meter. It represents the magnetic flux across a surface of 1 square meter perpendicular to a magnetic field.
Conversion Factor: 1 T = 1 Wb/m² -
Weber per Square Meter (Wb/m²): Represents the magnetic flux in Weber across a surface of 1 square meter perpendicular to a magnetic field. It is an equivalent to the Tesla unit.
Conversion Factor: 1 Wb/m² = 1 T -
Weber per Square Centimeter (Wb/cm²): Similar to the weber per square meter, but its surface is expressed in square centimeters instead.
Conversion Factor: 1 Wb/cm² = 10,000 T -
Weber per Square Inch (Wb/in²): Similar to the weber per square meter, but its surface is expressed in square inches instead.
Conversion Factor: 1 Wb/in² = 1,550.0031 T -
Maxwell per Square Meter (Mx/m²): A CGS unit representing the magnetic flux in Maxwell across a surface of 1 square meter perpendicular to a magnetic field.
Conversion Factor: 1 Mx/m² = 1 / 100,000,000 T = 0.00000001 T -
Maxwell per Square Centimeter (Mx/cm²): Similar to the maxwell per square meter, but its surface is expressed in square centimeters instead.
Conversion Factor: 1 Mx/cm² = 1 / 10,000 T = 0.0001 T -
Maxwell per Square Inch (Mx/in²): Similar to the maxwell per square meter, but its surface is expressed in square inches instead.
Conversion Factor: 1 Mx/in² = 1 / 64,516 T = 0.000015500031 T -
Gauss (G): A unit used in the CGS system, equivalent to the maxwell per square centimeter unit.
Conversion Factor: 1 G = 1 Mx/cm² = 0.0001 T -
Line per Square Centimeter (l/cm²): An equivalent unit to the maxwell per square centimeter.
Conversion Factor: 1 l/cm² = 1 Mx/cm² = 0.0001 T -
Line per Square Inch (l/in²): An equivalent unit to the maxwell per square inch.
Conversion Factor: 1 l/in² = 1 Mx/in² = 0.000015500031 T -
Gamma (γ): A non-SI unit of magnetic flux density, sometimes used in geophysics, equal to 10^(-5) Gauss, or 1 Nanotesla.
Conversion Factor: 1 γ = 1 × 10^(-9) T = 0.000000001 T
Frequently asked questions
Is the tesla the same as the A/m?
No. The tesla measures the flux density B, and the ampere per meter the field strength H, which is converted in the Magnetic Field Strength Converter. In air, B = μ0 * H, so 1 A/m is about 1.2566 µT, and 1 Oe matches 1 G.