Magnetic Field Converter

Convert magnetic field values between tesla, gauss, and oersted for physics notes, magnet specifications, electronics, and lab calculations. The form asks for a Value, From unit, and To unit, then displays the selected conversion and all supported equivalents.

How to use this converter

Enter a nonnegative magnetic field magnitude, choose the starting unit, and choose the target unit. The calculator uses tesla as the base unit. For related electrical unit work, see the electric current converter, power converter, or force converter.

Conversion formula

Tesla is the SI base used by the form. The conversion factors are:

$1\ gauss = 0.0001\ tesla$

$1\ oersted = 0.0001\ tesla$

The oersted relationship assumes vacuum or air where relative permeability is approximately 1. Magnetic materials require a permeability-specific calculation.

Worked example

To convert 0.25 T to gauss:

$0.25 \div 0.0001 = 2{,}500$

The calculator displays 2,500 G. The same numeric result appears for oersted under the form’s vacuum or air assumption.

Common values

Tesla	Gauss
0.0001 T	1 G
0.001 T	10 G
0.01 T	100 G
0.1 T	1,000 G
1 T	10,000 G

Do not confuse magnetic field strength with magnetic flux or force. Each has different units and formulas.

Frequently asked questions

How many gauss are in 1 tesla?

1 tesla equals 10,000 gauss because the calculator uses 1 gauss = 0.0001 tesla.

What is 0.5 tesla in gauss?

0.5 tesla equals 5,000 gauss.

How does this calculator handle oersted?

It treats 1 oersted as 0.0001 tesla, which assumes vacuum or air. Magnetic materials need permeability-specific calculations.

Can I convert negative magnetic field values?

No. The form accepts nonnegative values, so enter the magnitude of the field for this converter.