# 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/m$^2$].
* One tesla is equal to 10$^4$ gauss.
* Magnetic field drops off as the inverse cube of the distance (⁠1/distance$^3$⁠) from a dipole source.
* Energy required to produce laboratory magnetic fields increases with the square of magnetic field.

## Examples

These examples attempt to make the measuring point clear, usually the surface of the item mentioned.
Magnetic field strength (from lower to higher orders of magnitude) :
| Factor (tesla) | SI name | SI Value | CGS Value | Example of magnetic field strength |
| 10$^{−18}$ T | attotesla | 1 aT | 10 fG | |
| 10$^{−18}$ T | attotesla | 5 aT | 50 fG | Sensitivity of Gravity Probe B gyroscope's "SQUID" magnetometer (most sensitive when averaged over days) |
| 10$^{−17}$ T | attotesla | 10 aT | 100 fG | Sensitivity of Gravity Probe B gyroscope's "SQUID" magnetometer (most sensitive when averaged over days) |
| 10$^{−16}$ T | attotesla | 100 aT | 1 pG | Sensitivity of Gravity Probe B gyroscope's "SQUID" magnetometer (most sensitive when averaged over days) |
| 10$^{−15}$ T | femtotesla | 1 fT | 10 pG | Sensitivity of Gravity Probe B gyroscope's "SQUID" magnetometer (most sensitive when averaged over days) |
| 10$^{−15}$ T | femtotesla | 2 fT | 20 pG | Sensitivity of Gravity Probe B gyroscope's "SQUID" magnetometer (most sensitive when averaged over days) |
| 10$^{−14}$ T | femtotesla | 10 fT | 100 pG | |
| 10$^{−13}$ T | femtotesla | 100 fT | 1 nG | Human brain |
| 10$^{−12}$ T | picotesla | 1 pT | 10 nG | Human brain |
| 10$^{−11}$ T | picotesla | 10 pT | 100 nG | "Potholes" in the magnetic field found in the heliosheath around the Solar System reported by Voyager 1 (NASA, 2006) |
| 10$^{−10}$ T | picotesla | 100 pT | 1 μG | Heliosphere |
| 10$^{−9}$ T | nanotesla | 1 nT | 10 μG | Heliosphere |
| 10$^{−8}$ T | nanotesla | 10 nT | 100 μG | Heliosphere |
| 10$^{−7}$ T | nanotesla | 100 nT | 1 mG | Coffeemaker (30 cm or 1 ft away) |
| 10$^{−7}$ T | nanotesla | 100 nT to 500 nT | 1 mG to 5 mG | Residential electric distribution lines (34.5 kV) (15 m or 49 ft away) |
| 10$^{−6}$ T | microtesla | 1 μT | 10 mG | Blender (30 cm or 1 ft away) |
| 10$^{−6}$ T | microtesla | 1.3 μT to 2.7 μT | 13 mG to 27 mG | High power (500 kV) transmission lines (30 m or 100 ft away) |
| 10$^{−6}$ T | microtesla | 6 μT | 60 mG | Microwave oven (30 cm or 1 ft away) |
| 10$^{−5}$ T | microtesla | 10 μT | 100 mG | |
| 10$^{−5}$ T | microtesla | 24 μT | 240 mG | Magnetic tape near tape head |
| 10$^{−5}$ T | microtesla | 31 μT | 310 mG | Earth's magnetic field at 0° latitude (on the equator) |
| 10$^{−5}$ T | microtesla | 58 μT | 580 mG | Earth's magnetic field at 50° latitude |
| 10$^{−4}$ T | microtesla | 100 μT | 1 G | Magnetic flux density that will induce an electromotive force of 10$^{−8}$ volts in each centimeter of a wire moving perpendicularly at 1 ⁠centimeter/second⁠ by definition (1 gauss = 1 ⁠maxwell/centimeter²⁠) |
| 10$^{−4}$ T | microtesla | 500 μT | 5 G | Suggested exposure limit for cardiac pacemakers by American Conference of Governmental Industrial Hygienists (ACGIH) |
| 10$^{−3}$ T | millitesla | 1 mT | 10 G | Refrigerator magnets (10 G to 100 G) |
| 10$^{−2}$ T | centitesla | 10 mT | 100 G | Refrigerator magnets (10 G to 100 G) |
| 10$^{−2}$ T | centitesla | 30 mT | 300 G | Penny-sized ferrite magnet |
| 10$^{−1}$ T | decitesla | 100 mT | 1 kG | Penny-sized neodymium magnet |
| 10$^{−1}$ T | decitesla | 150 mT | 1.5 kG | Sunspot |
| 10$^0$ T | tesla | 1 T | 10 kG | Inside the core of a 60 Hz power transformer (1 T to 2 T as of 2001) or voice coil gap of a loudspeaker magnet (1 T to 2.4 T as of 2006) |
| 10$^0$ T | tesla | 1.5 T to 7 T | 15 kG to 70 kG | Medical magnetic resonance imaging systems (in practice) |
| 10$^0$ T | tesla | 9.4 T | 94 kG | Experimental magnetic resonance imaging systems: NMR spectrometer at 400 MHz (9.4 T) to 500 MHz (11.7 T) |
| 10$^1$ T | decatesla | 10 T | 100 kG | Experimental magnetic resonance imaging systems: NMR spectrometer at 400 MHz (9.4 T) to 500 MHz (11.7 T) |
| 10$^1$ T | decatesla | 11.7 T | 117 kG | Experimental magnetic resonance imaging systems: NMR spectrometer at 400 MHz (9.4 T) to 500 MHz (11.7 T) |
| 10$^1$ T | decatesla | 16 T | 160 kG | Levitate a frog by distorting its atomic orbitals |
| 10$^1$ T | decatesla | 23.5 T | 235 kG | 1 GHz NMR spectrometer |
| 10$^1$ T | decatesla | 32 T | 235 kG | Strongest continuous magnet field produced by all-superconducting magnet |
| 10$^1$ T | decatesla | 38 T | 380 kG | Strongest continuous magnetic field produced by non-superconductive resistive magnet |
| 10$^1$ T | decatesla | 45.22 T | 452.2 kG | Strongest non-tiny continuous magnetic field produced in a laboratory (Steady High Magnetic Field Facility (SHMFF) in Hefei, China, 2022), beating previous 45 T record (National High Magnetic Field Laboratory's FSU, USA, 1999) (both are hybrid magnets, combining a superconducting magnet with a resistive magnet) |
| 10$^1$ T | decatesla | 45.5 T | 455 kG | Strongest continuous magnetic field produced in a laboratory (National High Magnetic Field Laboratory's FSU, USA, 2019), though the magnet is tiny (only 390 grams) |
| 10$^2$ T | hectotesla | 100 T | 1 MG | Strongest pulsed non-destructive ("multi-shot") magnetic field produced in a laboratory (Pulsed Field Facility at National High Magnetic Field Laboratory's Los Alamos National Laboratory, Los Alamos, NM, USA) |
| 10$^3$ T | kilotesla | 1 kT | 10 MG | |
| 10$^3$ T | kilotesla | 1.2 kT | 12 MG | Record for indoor pulsed magnetic field, (University of Tokyo, 2018) |
| 10$^3$ T | kilotesla | 2.8 kT | 28 MG | Record for human produced, pulsed magnetic field, (VNIIEF, 2001) |
| 10$^4$ T | kilotesla | 10 kT | 100 MG | |
| 10$^4$ T | kilotesla | 35 kT | 350 MG | Felt by valence electrons in a xenon atom due to the spin–orbit effect |
| 10$^5$ T | kilotesla | 100 kT | 1 GG | Non-magnetar neutron stars |
| 10$^6$ T | megatesla | 1 MT | 10 GG | Non-magnetar neutron stars |
| 10$^7$ T | megatesla | 10 MT | 100 GG | Non-magnetar neutron stars |
| 10$^8$ T | megatesla | 100 MT | 1 TG | Non-magnetar neutron stars |
| 10$^9$ T | gigatesla | 1 GT | 10 TG | Schwinger limit (~4.41 GT) above which the electromagnetic field becomes nonlinear |
| 10$^{10}$ T | gigatesla | 10 GT | 100 TG | Magnetar neutron stars |
| 10$^{11}$ T | gigatesla | 100 GT | 1 PG | Magnetar neutron stars |
| 10$^{12}$ T | teratesla | 1 TT | 10 PG | |
| 10$^{13}$ T | teratesla | 10 TT | 100 PG | |
| 10$^{13}$ T | teratesla | 16 TT | 160 PG | Swift J0243.6+6124 most magnetic pulsar |
| 10$^{14}$ T | teratesla | 100 TT | 1 EG | Magnetic fields inside heavy ion collisions at RHIC |