How Strong Is a Standard Magnet?

Magnet strength is measured in either gauss or tesla units.
••• magnet attracting dollar signs image by Steve Johnson from

Magnets are used for a variety of applications. From your common refrigerator magnet to the magnets used in MRI machines, they can be both entertaining and practical. The strength of a magnetic field is measured in either gauss or tesla units.

Types of Magnets

Magnets come in two types: Permanent magnets will have a magnetic field no matter what happens to them. Electromagnets are metals that only have a magnetic field when an electric current runs through them. Some soft metals can become temporarily magnetized in the presence of a magnetic field, but once the field is gone, they are no longer magnetic. Standard magnets, like fridge magnets, are permanent magnets.

Measuring Magnetic Strength

The strength of a magnetic field is typically measured in either gauss or tesla units. One tesla equals 10,000 gauss. Magnometers, gaussmeters or pull-testers are all used to gauge the strength of a magnet.

Standard Magnet Strength

According to the National High Magnetic Field Laboratory of Florida State University, a fridge magnet is about 0.001 tesla. To put that in perspective, the Earth's magnetic field is about 0.00005 tesla and an average MRI magnet measures 1.5 tesla.

Related Articles

What Is the Gauss Rating for a Strong Magnet?
The Uses of Different Shaped Magnets
Science Facts About Magnets for Kids
Test Your Knowledge on Middle School Science
How to Create a Powerful Magnetic Field
Factors That Affect the Strength of an Electromagnet
What Is the Difference Between Yards & Feet?
List of Metals That Are Attracted to Magnets
Differences Between Magnets
How to Convert Kilopascals to Joules
What Are Bar Magnets Used For?
How to Determine Square Feet Area
How to Calculate Standard Errors
Science Fair Magnet Ideas
How to Find a Z Score
How to Calculate the Normality of HCL
How to Build a Super Magnet
How to Calculate a Circular Area
How to Build a Magnetic Coil