0769-23388351
Toggle Navigation
I saw many friends on the Internet looking for the formula for calculating the weight of magnets. Today, Xiaofu, the manufacturer of courage magnets, will share with you the weight calculation method of round, ring and block magnets for neodymium magnets.
Magnets of different materials have different densities and need to be replaced before calculation. The following calculation formulas are all taking neodymium magnets as an example, and the density of ferrite is 4.9.
For example: NdFeB Magnet F20x10x3mm, where the density is calculated as 7.5
The formula is: 20*10*3*7.5/1000=4.5g,
The formula for calculating the weight of disc Nd-Fe-B magnet is as follows: (density is calculated by 7.5)
For example, the disc magnet specification is 20.5 x 8.9mm
The formula is: area x thickness x density/1000 = weight (g), that is
7.5 x 3.14 x 20.5² x 8.9/4000=22.02g或7.5 x 3.14 x 10..25² x 8.9/1000=22.02g
Formula for calculating the weight of ring magnet
π x (a+b)(a-b) x c(thickness) x p(density)/4000 [where A and B represent length and width respectively]
For example, the weight of a magnet with an outer diameter of 12mm, an inner diameter of 7mm and a thickness of 3mm is; 3.14 x (12+7) x (12-7) x3 x 7.5/4000 is approximately equal to 1.7g
As for the calculation formula of the motor arc magnet, Xiaofu can't do it yet.
This article is originally shared by Xiaofu, a china magnet manufacturer, to learn more about magnets by clicking on the magnet question and answer.
Related magnet calculation tools;
Magnetic pull force online calculation
As shown in the picture, this product is a half-ring segmented magnet, standard half-ring shape, 2 half-ring can be put together to form a circle, the material is rare earth neodymium, with super strong magnetism, according to the customer's requirements, this half-ring magnet in the inner diameter of the larger R angle....
Have you ever seen this 10-sided magnet? I guess not. This is a 10-bar circular hole magnet with magnetized thickness, produced by China magnet supplier Guowei Magnet. The material of the magnet is rare earth neodymium, which belongs to customized special neodymium magnet, which can be used in industry, mechanical parts and electronic parts. We can also process the neodymium strong magnetic in the size and shape you want according...
This sample is a semi-circular neodymium magnet, the performance grade is N40, the maximum working temperature is 80 ℃, the surface coating is nickel-copper-nickel, the appearance is silver-white, and the size can be customized. Industry experience, drawings and samples are customized according to industry needs, quality is guaranteed...
This product is wind turbine magnet, the material is rare earth neodymium, the shape is trapezoidal, fan-shaped, arc section, the surface is galvanized, there is also a hole processed in the magnet (countersunk screw holes), belongs to the customized shape of the motor class magnets, such as you have specific requirements, such as the size, performance, temperature and other requirements can be contacted to provide you with quotations, prototyping and other services....
This is an ultra-small ferrite block magnet, small and thin, with a thickness of only 0.8mm, a length of 3.8mm, and a width of 2mm. It is mainly used for precision electronics, Hall sensors, and is magnetized in the direction of 2. The strong magnetic surface is the length If you are interested in this kind of small ferrite magnets, you can contact us to customize without pressure!...
This is the courage magnet manufacturer to provide you with a anisotropy multi-pole ferrite ring magnet, through the side (radial) 12 pole magnetization, the surface magnetic is about 1050 gauss, its size is 28.4mm outer diameter, 17.5mm inner hole, thickness of 4mm...
This product is a ring-shaped ferrite magnet with an outer diameter of 20mm, an inner diameter of 10mm, and a thickness of 3mm. There is no coating on the outside. The magnetizing method is axial/planar 4 poles and the surface magnetic field strength is about 980gs. If you are interested in this magnet, please contact We provide you with samples, and other specifications are needed. We can also provide you with more magnetic poles....
Sample shot is a small and thin radial neodymium magnet ring, belongs to rare earth magnets, zinc-plated surface, outer diameter 6.5mm, inner hole diameter 3.5mm, thickness 0.5mm, through the diameter of the direction of the magnetization...