Magnet strength chart

By Fridge Magnets EditorialUpdated

Filter and sort reference pull-force figures by material, size, or use. See the limits of published ratings.

Published specifications. These figures describe a straight pull from steel, so they do not predict how much weight a magnet can hold without sliding down a fridge.

12 magnets shown.

Flexible rubber sheet1.97 x 1.97 in (50 x 50 mm), 0.020 in thick (0.5 mm)Ferrite in vinyl600.1Business cards, calendars
Flexible rubber sheet1.97 x 1.97 in (50 x 50 mm), 0.030 in thick (0.75 mm)Ferrite in vinyl1100.2Photo prints, promo
Pressed photo magnetAbout 2.24 in round (57 mm)Ferrite disc in steel shellNot publishedNot publishedPhoto magnets
Pressed photo magnetAbout 2.52 in square (64 mm)Ferrite disc in steel shellNot publishedNot publishedPhoto magnets
Ceramic ferrite disc0.79 x 0.12 in (20 x 3 mm)Ferrite C85001.1Craft backs, souvenirs
Ceramic ferrite disc0.98 x 0.20 in (25 x 5 mm)Ferrite C811002.4Heavy souvenirs
Neodymium disc0.24 x 0.08 in (6 x 2 mm)NdFeB N427001.5Tiny hidden magnets
Neodymium disc0.39 x 0.08 in (10 x 2 mm)NdFeB N4214003.1Photo clips, small holders
Neodymium disc0.47 x 0.12 in (12 x 3 mm)NdFeB N4225005.5Holding paper stacks
Neodymium disc0.79 x 0.12 in (20 x 3 mm)NdFeB N4235007.7Bottle openers, hooks
Neodymium cube0.39 in (10 mm)NdFeB N42480010.6Whiteboards, office
Neodymium pot magnet0.63 in diameter (16 mm) with hookNdFeB in steel cup600013.2Hanging utensils

No products in this chart have been measured here. Missing figures stay marked as not published. Check the sources below for the published data and its limits.

Read the test conditions first

A pull-force rating describes the force needed to lift a magnet straight away from a test surface. Manufacturers commonly use flat, bare steel. A thicker steel plate, a different coating, or a small gap can change the result.

The chart compares the reference figures used in this guide. We have not measured these magnets here. It does not predict the performance of every product with the same dimensions. Check the seller's data sheet for the actual magnet you plan to buy, including the material grade and test conditions.

Holding a note on a door

A magnet on a vertical fridge door is loaded sideways. The note stays up because friction resists sliding. A direct pull-force rating gives you one part of the picture; it does not measure that sideways resistance.

Paint, texture, a curved surface, and the magnet's backing can all affect contact. The guide uses estimates to discuss those differences, but a fixed percentage cannot certify what a particular magnet will hold on your door. Try a sample with the items you want to display.

The material comparison explains the differences between flexible sheet, ferrite, and neodymium. Magnet strength explained covers pull force and magnetic field measurements.

Missing figures

Pressed photo magnets remain in the chart so you can compare their size and construction. Their pull-force cells are marked as not published because there is no verified figure available here. Sorting by force keeps those rows below the numeric results.

A missing figure does not mean a magnet has no grip. It means you need a specification from the seller or a physical sample to answer that question.

Sources

  1. K&J Magnetics, pull force explained
  2. K&J Magnetics, pull force calculator
  3. supermagnete, 12 x 3 mm disc data sheet