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History of magnets

How do magnets work?

Magnetic strength and measurement

Uses of magnets for common ailments

Application of magnetic therapy

Magnetic Therapy Research

Magnetic water

Animals and Magnetic therapy


Painkillers And Their Side-Effects

How Healthy Are You?

Magnetic strength, types and measurement

Measuring the strength (gauss/ tesla) of a magnet.

    You may already have some therapeutic magnets that you are currently using or want to use. The packaging that your magnet came in should state the gauss/ tesla rating of the magnetic device. If it did not state the rating on the packet the manufacturer should have provided you with information regarding the strength of the magnets.

    If you have a magnet of unknown strength it is possible to find out the gauss/tesla rating. You can do this by 2 methods:

1. By using a gauss meter. A gauss meter is an electronic device which measures the magnetic field and the magnetic strength on the surface of a magnet. They can measure magnets ranging from 200-20,000 gauss (20 m tesla- 2 tesla). A gauss meter is also able to detect if a magnet is losing its strength (demagnetising).


A DC gauss meter (sometimes called a magnetometer)

    Gauss meters are extremely useful in industry and for anyone who works with magnets, but as they cost around £200. They are not an option for most domestic homes.

2. If you do not have access to a gauss meter there is another way to approximate the strength of a magnet. This method is based on Carl Freidrich Gaussís own original method for magnetic measurement and it is still used for scientific experiments in most schools today.

    For this method if calculation you will need a piece of paper, a pen (or pencil), a compass, a ruler and a magnet that you know the strength of, plus of course the magnet that you want to measure.
i. Place the ruler on the piece of paper.
ii. Place the compass on the piece of paper at the centre point of the ruler.
iii. Starting from one end of the ruler slowly move the magnet, whose gauss rating is known, along the ruler towards the compass.
iv. When the needle of the compass begins to move toward the magnet, stop and place a mark on the paper at the stopping point on the ruler.
v. Begin to move the unknown magnet towards the compass from the other end of the ruler.
vi. When the compass again starts to move towards the unknown magnet stop and place a mark on the paper at the stopping point on the ruler.

    To work out the strength of the unknown magnet you must look at the 2 stopping points marked on the paper. If the stopping point of the unknown magnet is farther away from the centre of the ruler then the unknown magnet is stronger than the known magnet and if the stopping point of the unknown magnet is nearer to the centre point of the ruler then the unknown magnet is weaker than the known magnet. This is a very approximate calculation of the strength of the unknown magnet, calculate the exact strength you will need to work out the ratio of the square distances between the 2 magnets and the centre point of the ruler.

    If you are unable to use any of these 2 methods then I would suggest you contact the supplier and ask for the strength of the magnet, if they can not or will not tell you the strength , then do not use the magnet.

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