What does N42, N45, N50 etc. mean?

How do you measure the quality of a magnet?

The following specifications can be encountered when working with magnets: N35, N38, N40 N45 etc.

These letters and numbers mean the following:

• How much magnetic energy the magnet contains.
• At what temperature can the magnet be used.

Numbers 35, 40 , 42 50 etc. is a number for how much magnetic energy the magnet contains. The higher the number, the stronger the magnet.

The letters say something about the high temperature the magnet can work at. The different temperatures can e.g. be 80, 100, 120, 150, 180 and 200 °C. Most of our magnets have the designation "N" and can therefore be used at max. 80 °C.

In everyday speech, when talking about the strength of magnets, it is when the magnet has direct contact with a metal plate. Other factors that influence the strength of the magnet:

• The size of the magnet
• The shape of the magnet
• The proportions of the magnet (e.g. the ratio of the diameter of the magnet and height also play a role).
• Combination with other materials, for example that the magnet is mounted on a piece of metal, in a metal pot, or the magnet is "freestanding".

Units of measurement

One way to measure magnetism is in Tesla or Gauss. Gauss is the most widely used. Here are examples of Gauss for the most commonly used N values: 

• N35 = 11700-12100 Gauss
• N38 = 12200-12600 Gauss
• N42 = 12900-13200 Gauss
• N45 = 13200-13700 Gauss
• N48 = 13700-14200 Gauss
• N50 = 14000-14600 Gauss

Search for a specific N value

If you are looking for a magnet with a specific N value, you can use the search field at the top of the left side. There you can e.g. write N50 and then all our magnets with N50 in value will be displayed. 

Our most popular magnets are with N45 value, which is why we have so many of this kind.

Below are all our N45 magnets: