What Is the Gauss Rating for a Strong Magnet?

The Earth's magnetic field is around half a gauss.
••• Jupiterimages/Photos.com/Getty Images

The gauss is a measure of the strength of magnetic fields, relating force, length and electric current. It is used to conveniently measure weak fields, such as a small permanent magnets. Because it’s a small unit, strong magnets will result in large measurements in gauss.


The gauss is a unit of magnetic field strength named after mathematician Carl F. Gauss. It’s useful for dealing with relatively weak magnetic forces. The Earth’s magnetic field measures a few gauss.

Magnet Strength

The stronger the magnet, the denser its magnetic field. Its field produces forces in other magnets and in metals.

Permanent Magnets

Currently, the strongest permanent magnets are those made with rare-earth metals such as neodymium. Their magnetic strength can be more than 14,000 gauss. This figure can also be stated as 14 Kilogauss (KGs).


Magnets used in Magnetic Resonance Imaging (MRI) machines are electromagnets that are supercooled with liquid helium. They are the strongest magnets in regular use, running 20,000 to 70,000 gauss.


Special magnets are used in scientific research to test the limits of magnet construction techniques and materials. The strongest experimental magnets run about 45 tesla, or 450,000 gauss.

Related Articles

Ace Your Middle School Science Fair with These Science...
List of Metals That Are Attracted to Magnets
Two Advantages of an Electromagnet Over a Permanent...
How Strong Is a Standard Magnet?
How to Calculate Pendulum Force
How to Calculate the Henrys in a Coil
How to Calculate Magnetization
How to Calculate the Magnetic Force of a Solenoid
Demagnetizing a Steel Nail
Science Facts About Magnets for Kids
Hydrometer Calibration Procedures
The Uses of Different Shaped Magnets
Factors That Affect the Strength of an Electromagnet
How to Calculate Volume of a Rectangular Prism
How to Make Objects Move with a Magnet
How to Calculate kPa
An Electrical Engineer's Vocabulary Words
What Is a Gauss Meter?
Difference Between Rare-Earth & Ceramic Magnets
How to Convert Specific Gravity in Weight