Orders of magnitude (magnetic field)

This page lists examples of magnetic induction B in teslas and gauss produced by various sources, grouped by orders of magnitude.

The magnetic flux density does not measure how strong a magnetic field is, but only how strong the magnetic flux is in a given point or at a given distance (usually right above the magnet's surface). For the intrinsic order of magnitude of magnetic fields, see: Orders of magnitude (magnetic moment).

Note:

Traditionally, the magnetizing field, H, is measured in amperes per meter.
Magnetic induction B (also known as magnetic flux density) has the SI unit tesla [T or Wb/m²].^[1]
One tesla is equal to 10⁴ gauss.
Magnetic field drops off as the inverse cube of the distance $(.mw-parser-output .sfrac{white-space:nowrap}.mw-parser-output .sfrac.tion,.mw-parser-output .sfrac .tion{display:inline-block;vertical-align:-0.5em;font-size:85%;text-align:center}.mw-parser-output .sfrac .num{display:block;line-height:1em;margin:0.0em 0.1em;border-bottom:1px solid}.mw-parser-output .sfrac .den{display:block;line-height:1em;margin:0.1em 0.1em}.mw-parser-output .sr-only{border:0;clip:rect(0,0,0,0);clip-path:polygon(0px 0px,0px 0px,0px 0px);height:1px;margin:-1px;overflow:hidden;padding:0;position:absolute;width:1px}⁠1/distance3⁠)$ from a dipole source.
Energy required to produce laboratory magnetic fields increases with the square of magnetic field.^[2]

^ "Bureau International des Poids et Mesures, The International System of Units (SI), 8th edition 2006" (PDF). bipm.org. 2012-10-01. Retrieved 2013-05-26.
^ Laboratory, National High Magnetic Field. "Tesla Definition - MagLab". nationalmaglab.org. Retrieved 2023-12-29.

[bipm_si-1] "Bureau International des Poids et Mesures, The International System of Units (SI), 8th edition 2006" (PDF). bipm.org. 2012-10-01. Retrieved 2013-05-26.

[2] Laboratory, National High Magnetic Field. "Tesla Definition - MagLab". nationalmaglab.org. Retrieved 2023-12-29.

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