Guide to Choosing the Right Magnet Strength

Do you need a magnet but don't know which strength to choose? This guide will help you make an informed decision. There are different strengths of magnets, each with its own uses, from weak refrigerator magnets to powerful neodymium magnets. Whether you're a DIY enthusiast, a science buff, or just need a magnet for everyday use, understanding the magnet strength chart is important.

We'll go through the strengths, uses, and limitations of each type. By the end of this guide, you'll have all the information you need to choose the right magnet confidently. Let's explore the fascinating world of magnetism together!

What is the Magnet Strength Chart?

The Magnet Strength Chart could help people determine the strength of magnets for different uses. Magnets are graded based on their maximum energy product, which measures the magnetic energy stored in the magnet. This energy product is expressed in units of Mega-Gauss-Oersteds (MGOe) or kilojoules per cubic meter (kJ/m³). The higher the grade, the stronger the magnet.

However, other factors also affect how magnets perform, like their shape, size, and material. But by checking the Magnet Strength Chart, people can have a better idea of the relative strength of different magnets.

Magnet Strength Grades

Magnets come in different grades based on their strength, with the most common grading systems being the N, C, and SmCo series. Here are the details:

1. N Series (Neodymium Magnets): These are the strongest magnets available, with a strength ranging from 27 MGOe to 55 MGOe. The N grade is followed by a number, like N35 or N52, which shows the highest energy product. They are used in motors, generators, therapy magnets, and audio equipment.

   Grades & Strength of Neodymium Magnets

   Grade	Remanence Induction		Coercive Force		Intrinsic Coercive Force		Maximum Energy Product		Working Temperature	Density
   	Br		HcB		HcJ		(BH)max		Tw	ρ
   	T	KGs	KA/m	KOe	KA/m	KOe	KJ/m³	MGOe	℃	g/cm3
   General Process
   N38	1.23-1.30	12.3-13.0	≥876	≥11	≥955	≥12	287-318	36-40	≤80	≥7.5
   N40	1.26-1.32	12.6-13.2	≥876	≥11	≥955	≥12	302-334	38-42	≤80	≥7.5
   N42	1.29-1.35	12.9-13.5	≥876	≥11	≥955	≥12	318-350	40-44	≤80	≥7.5
   N45	1.32-1.38	13.2-13.8	≥876	≥11	≥955	≥12	334-366	42-46	≤80	≥7.5
   N48	1.37-1.43	13.7-14.3	≥876	≥11	≥955	≥12	358-390	45-49	≤80	≥7.5
   N50	1.40-1.45	14.0-14.5	≥876	≥11	≥955	≥12	374-406	47-51	≤80	≥7.5
   N52	1.42-1.48	14.2-14.8	≥836	≥10.5	≥876	≥11	390-422	49-53	≤80	≥7.5
   N55	1.46-1.51	14.6-15.1	≥860	≥10.8	≥955	≥12	406-438	51-55	≤80	≥7.5
   N38M	1.23-1.30	12.3-13.0	≥915	≥11.5	≥1114	≥14	287-318	36-40	≤100	≥7.5
   N40M	1.26-1.32	12.6-13.2	≥939	≥11.8	≥1114	≥14	302-334	38-42	≤100	≥7.5
   N42M	1.29-1.35	12.9-13.5	≥963	≥12.1	≥1114	≥14	318-350	40-44	≤100	≥7.5
   N45M	1.32-1.38	13.2-13.8	≥987	≥12.4	≥1114	≥14	334-366	42-46	≤100	≥7.5
   N48M	1.37-1.43	13.7-14.3	≥1019	≥12.8	≥1114	≥14	358-390	45-49	≤100	≥7.5
   N50M	1.40-1.45	14.0-14.5	≥1043	≥13.1	≥1114	≥14	374-406	47-51	≤100	≥7.5
   N52M	1.42-1.48	14.2-14.8	≥1059	≥13.3	≥1114	≥14	390-422	49-53	≤100	≥7.5
   N54M	1.46-1.51	14.6-15.1	≥995	≥12.5	≥1035	≥13	406-438	51-55	≤100	≥7.5
   N35H	1.17-1.24	11.7-12.4	≥876	≥11.0	≥1353	≥17	263-295	33-37	≤120	≥7.5
   N38H	1.23-1.30	12.3-13.0	≥915	≥11.5	≥1353	≥17	286-318	36-40	≤120	≥7.5
   N40H	1.26-1.32	12.6-13.2	≥939	≥11.8	≥1353	≥17	302-334	38-42	≤120	≥7.5
   N42H	1.29-1.35	12.9-13.5	≥963	≥12.1	≥1353	≥17	318-350	40-44	≤120	≥7.5
   N45H	1.32-1.38	13.2-13.8	≥987	≥12.4	≥1353	≥17	334-366	42-46	≤120	≥7.5
   N48H	1.37-1.43	13.7-14.3	≥1011	≥12.7	≥1353	≥17	358-390	45-49	≤120	≥7.5
   N50H	1.40-1.45	14.0-14.5	≥1027	≥12.9	≥1353	≥17	374-406	47-51	≤120	≥7.5
   N52H	1.42-1.48	14.2-14.8	≥1059	≥13.3	≥1353	≥17	390-422	49-53	≤120	≥7.5
   N33SH	1.14-1.21	11.4-12.1	≥852	≥10.7	≥1592	≥20	247-279	31-35	≤150	≥7.5
   N35SH	1.17-1.24	11.7-12.4	≥876	≥11.0	≥1592	≥20	263-295	33-37	≤150	≥7.5
   N38SH	1.23-1.29	12.3-12.9	≥915	≥11.5	≥1592	≥20	287-318	36-40	≤150	≥7.5
   N40SH	1.26-1.32	12.6-13.2	≥939	≥11.8	≥1592	≥20	302-334	38-42	≤150	≥7.5
   N42SH	1.29-1.35	12.9-13.5	≥963	≥12.1	≥1592	≥20	318-350	40-44	≤150	≥7.5
   N45SH	1.32-1.38	13.2-13.8	≥987	≥12.4	≥1592	≥20	334-366	42-46	≤150	≥7.5
   N48SH	1.37-1.43	13.7-14.3	≥1011	≥12.7	≥1592	≥20	358-390	45-49	≤150	≥7.5
   N50SH	1.40-1.45	14.0-14.5	≥1027	≥12.9	≥1592	≥20	374-406	47-51	≤150	≥7.5
   N52SH	1.42-1.48	14.2-14.8	≥1035	≥13	≥1512	≥19	390-422	49-53	≤150	≥7.5
   N30UH	1.08-1.13	10.8-11.3	≥796	≥10.0	≥1990	≥25	223-255	28-31	≤180	≥7.5
   N33UH	1.14-1.18	11.4-11.8	≥852	≥10.5	≥1990	≥25	247-279	31-35	≤180	≥7.5
   N35UH	1.17-1.24	11.7-12.4	≥876	≥11.0	≥1990	≥25	263-295	33-37	≤180	≥7.5
   N38UH	1.23-1.29	12.3-12.9	≥915	≥11.5	≥1990	≥25	287-318	36-40	≤180	≥7.5
   N40UH	1.26-1.32	12.6-13.2	≥939	≥11.8	≥1990	≥25	302-334	38-42	≤180	≥7.5
   N42UH	1.28-1.35	12.8-13.5	≥963	≥12.1	≥1990	≥25	310-350	39-44	≤180	≥7.5
   N45UH	1.32-1.38	13.2-13.8	≥987	≥12.4	≥1990	≥25	334-366	42-46	≤180	≥7.5
   N48UH	1.37-1.42	13.7-14.2	≥1019	≥12.8	≥1910	≥24	358-390	45-49	≤180	≥7.5
   N30EH	1.08-1.15	10.8-11.5	≥812	≥10.2	≥2388	≥30	223-255	28-32	≤200	≥7.5
   N33EH	1.14-1.21	11.4-12.1	≥851	≥10.7	≥2388	≥30	247-279	31-35	≤200	≥7.5
   N35EH	1.17-1.24	11.7-12.4	≥876	≥11.0	≥2388	≥30	263-295	33-37	≤200	≥7.5
   N38EH	1.23-1.29	12.3-12.9	≥915	≥11.5	≥2388	≥30	287-318	36-40	≤200	≥7.5
   N40EH	1.26-1.32	12.6-13.2	≥939	≥11.8	≥2388	≥30	302-334	38-42	≤200	≥7.5
   N42EH	1.28-1.35	12.8-13.5	≥963	≥12.1	≥2388	≥30	310-350	39-44	≤200	≥7.5
   N45EH	1.33-1.38	13.3-13.8	≥995	≥12.5	≥2308	≥29	334-366	42-46	≤200	≥7.5
   N28AH	1.04-1.12	10.4-11.2	≥772	≥9.7	≥2786	≥35	207-239	26-30	≤230	≥7.5
   N30AH	1.08-1.15	10.8-11.5	≥812	≥10.2	≥2786	≥35	223-255	28-32	≤230	≥7.5
   N33AH	1.14-1.21	11.4-12.1	≥852	≥10.7	≥2786	≥35	247-279	31-35	≤230	≥7.5
   N35AH	1.17-1.24	11.7-12.4	≥876	≥11.0	≥2786	≥35	263-295	33-37	≤230	≥7.5
   N38AH	1.23-1.27	12.3-12.7	≥923	≥11.6	≥2786	≥35	287-318	36-40	≤230	≥7.5
   N40AH	1.26-1.31	12.6-13.1	≥939	≥11.8	≥2628	≥33	302-334	38-42	≤230	≥7.5
   N42AH	1.29-1.35	12.9-13.5	≥955	≥12.0	≥2628	≥33	318-350	40-44	≤230	≥7.5

2. Ferrite (Ceramic) Magnets: These magnets are relatively weaker than Neodymium, with a strength ranging from 1 MGOe to 4.5 MGOe. The C grade is accompanied by a number, such as Y10 or Y35, that shows the maximum energy product. They are commonly used in speakers, magnetic separators, and refrigerator magnets.

   Grades & Strength of Ceramic Magnets

   Item	Grade	Remanence Induction		Coercive Force		Intrinsic Coercive Force		Maximum Energy Product
   		Br		HcB		HcJ		(BH)max
   		T	KGs	KA/m	KOe	KA/m	KOe	KJ/m³	MGOe
   Ferrite	Y8T	200-235	2.0-2.35	125-160	1.57-2.01	210-280	2.64-3.52	6.5-9.5	0.8-1.2
   	Y10T	200-235	2.0-2.35	128-160	1.61-2.01	210-280	2.64-3.52	6.4-9.6	0.8-1.2
   	Y20	320-380	3.2-3.8	135-190	1.70-2.39	140-195	1.76-2.45	18.0-22.0	2.3-2.8
   	Y22H	310-360	3.1-3.6	220-250	2.76-3.14	280-320	3.52-4.02	20.0-24.0	2.5-3.0
   	Y23	320-370	3.2-3.7	170-190	2.14-2.39	190-230	2.39-2.89	20.0-25.5	2.5-3.2
   	Y25	360-400	3.6-4.0	135-170	1.70-2.14	140-200	1.76-2.51	22.5-28.0	2.8-3.5
   	Y26H	360-390	3.6-3.9	220-250	2.76-3.14	225-255	2.83-3.20	23.0-28.0	2.9-3.5
   	Y26H-1	360-390	3.6-3.9	200-250	2.51-3.14	225-255	2.83-3.20	23.0-28.0	2.9-3.5
   	Y26H-2	360-380	3.6-3.8	263-288	3.30-3.62	318-350	4.00-4.40	24.0-28.0	3.0-3.5
   	Y27H	370-400	3.7-4.0	205-250	2.58-3.14	210-255	2.64-3.20	25.0-29.0	3.1-3.6
   	Y28	370-400	3.7-4.0	175-210	2.20-2.64	180-220	2.26-2.76	26.0-30.0	3.3-3.8
   	Y28H-1	380-400	3.8-4.0	240-260	3.02-3.27	250-280	3.14-3.52	27.0-30.0	3.4-3.8
   	Y28H-2	360-380	3.3-3.8	271-295	3.41-3.71	382-405	4.80-5.09	26.0-30.0	3.3-3.8
   	Y30	370-400	3.7-4.0	175-210	2.20-2.64	180-220	2.26-2.76	26.0-30.0	3.3-3.8
   	Y30BH	380-390	3.8-3.9	223-235	2.80-2.95	231-245	2.90-3.08	27.0-30.0	3.4-3.8
   	Y30H-1	380-400	3.8-4.0	230-275	2.89-3.46	235-290	2.95-3.64	27.0-32.0	3.4-4.0
   	Y30H-2	395-415	3.95-4.15	275-300	3.46-3.77	310-335	3.90-4.21	27.0-32.5	3.4-4.1
   	Y32	400-420	4.0-4.2	160-190	2.01-2.39	165-195	2.07-2.45	30.0-33.5	3.8-4.2
   	Y32H-1	400-420	4.0-4.2	190-230	2.39-2.89	230-250	2.89-3.14	31.5-35.0	4.0-4.4
   	Y32H-2	400-440	4.0-4.4	224-240	2.81-3.02	230-250	2.89-3.14	31.0-34.0	3.9-4.3
   	Y33	410-430	4.1-4.3	220-250	2.76-3.14	225-255	2.83-3.20	31.5-35.0	4.0-4.4
   	Y33H	410-430	4.1-4.3	250-270	3.14-3.39	250-275	3.14-3.46	31.5-35.0	4.0-4.4
   	Y34	420-440	4.2-4.4	200-230	2.51-2.89	205-235	2.58-2.95	32.5-36.0	4.1-4.5
   	Y35	430-450	4.3-4.5	215-239	2.70-3.00	217-241	2.73-3.03	33.1-38.2	4.2-4.8
   	Y36	430-450	4.3-4.5	247-271	3.10-3.41	250-274	3.14-3.44	35.1-38.3	4.4-4.8
   	Y38	440-460	4.4-4.6	285-305	3.58-3.83	294-310	3.69-3.90	36.6-40.6	4.6-5.1
   	Y40	440-460	4.4-4.6	330-354	4.15-4.45	340-360	4.27-4.52	37.5-41.8	4.7-5.3

3. SmCo Series (Samarium Cobalt Magnets): These are high-performance magnets, with a strength ranging from 18 MGOe to 32 MGOe. The SmCo grade comes with a number, like SmCo18 or SmCo32, that shows how much energy it can hold at most. They are used in aerospace and military applications.

   Grades & Strength of Samarium Cobalt Magnets

   Item	Grade	GBT 4180-2012	Remanence Induction		Coercive Force		Intrinsic Coercive Force		Maximum Energy Product		Working Temperat ure	Density
   			Br		HcB		HcJ		(BH)max		Tw	ρ
   			T	KGs	KA/m	KOe	KA/m	KOe	KJ/m³	MGOe	℃	g/cm3
   Sm1Co5	Sm1Co5-16	XG1S 135/96	0.79-0.84	7.9-8.4	620-660	7.8-8.3	≥1830	≥23	118-135	15-17	≤250	8.3
   	Sm1Co5-18	XG1S 143/160	0.84-0.89	8.4-8.9	660-700	8.3-8.8	≥1830	≥23	135-151	17-19	≤250	8.3
   	Sm1Co5-20	XG1S 159/140	0.89-0.93	8.9-9.3	684-732	8.6-9.2	≥1830	≥23	150-167	19-21	≤250	8.3
   	Sm1Co5-22	XG1S 175/140	0.92-0.96	9.2-9.6	710-756	8.9-9.5	≥1830	≥23	167-183	21-23	≤250	8.3
   	Sm1Co5-24	/	0.96-1.00	9.6-10.0	740-788	9.3-9.9	≥1830	≥23	183-199	23-25	≤250	8.3
   Sm2Co17	Sm2Co17-24L	/	0.95-1.02	9.5-10.2	541-716	6.8-9.0	636-955	8-12	175-191	22-24	≤250	8.4
   	Sm2Co17-26L	XGS 207/50	1.02-1.05	10.2-10.5	541-784	6.8-9.4	636-955	8-12	191-207	24-26	≤250	8.4
   	Sm2Co17-28L	XGS 223/50	1.03-1.08	10.3-10.8	541-764	6.8-9.6	636-955	8-12	207-220	26-28	≤250	8.4
   	Sm2Co17-30L	/	1.08-1.15	10.8-11.5	541-796	6.8-10.0	636-955	8-12	220-240	28-30	≤250	8.4
   	Sm2Co17-32L	/	1.10-1.15	11.0-11.5	541-812	6.8-10.2	636-955	8-12	230-255	29-32	≤250	8.4
   	Sm2Co17-26M	XGS 207/80	1.02-1.05	10.2-10.5	676-780	8.5-9.8	955-1433	12-18	191-207	24-26	≤300	8.4
   	Sm2Co17-28M	XGS 223/80	1.03-1.08	10.3-10.8	676-796	8.5-10.0	955-1433	12-18	207-220	26-28	≤300	8.4
   	Sm2Co17-30M	XGS 239/80	1.08-1.1	10.8-11.0	676-835	8.5-10.5	955-1433	12-18	220-240	28-30	≤300	8.4
   	Sm2Co17-32M	/	1.10-1.13	11.0-11.3	676-852	8.5-10.7	955-1433	12-18	230-255	29-32	≤300	8.4
   Sm2Co17	Sm2Co17-33M	/	1.13-1.15	11.3-11.5	820-870	10.3-10.9	955-1433	12-18	246-262	31-32	≤300	8.4
   	Sm2Co17-22	/	0.93-0.97	9.3-9.7	676-740	8.5-9.3	≥1433	≥18	160-183	20-23	≤300	8.4
   	Sm2Co17-24	/	0.95-1.02	9.5-10.2	692-764	8.7-9.6	≥1433	≥18	175-191	22-24	≤300	8.4
   	Sm2Co17-26	XGS 207/160	1.02-1.05	10.2-10.5	748-796	9.4-10.0	≥1433	≥18	191-207	24-26	≤300	8.4
   	Sm2Co17-28	XGS 223/160	1.03-1.08	10.3-10.8	756-812	9.5-10.2	≥1433	≥18	207-220	26-28	≤300	8.4
   	Sm2Co17-30	XGS 223/247	1.08-1.10	10.8-11.0	788-835	9.9-10.5	≥1433	≥18	220-240	28-30	≤300	8.4
   	Sm2Co17-32	/	1.10-1.13	11.0-11.3	812-860	10.2-10.8	≥1433	≥18	230-255	29-32	≤300	8.4
   	Sm2Co17-33	/	1.13-1.15	11.3-11.5	820-870	10.3-10.9	≥1433	≥18	246-262	31-32	≤300	8.4
   	Sm2Co17-24H	XGS 191/200	0.95-1.02	9.5-10.2	692-764	8.7-9.6	≥1990	≥25	175-191	22-24	≤350	8.4
   	Sm2Co17-26H	XGS 207/200	1.02-1.05	10.2-10.5	748-796	9.4-10.0	≥1990	≥25	191-207	24-26	≤350	8.4
   	Sm2Co17-28H	XGS 223/200	1.03-1.08	10.3-10.8	756-812	9.5-10.2	≥1990	≥25	207-220	26-28	≤350	8.4
   	Sm2Co17-30H	XGS 239/160	1.08-1.10	10.8-11.0	788-835	9.9-10.5	≥1990	≥25	220-240	28-30	≤350	8.4
   Sm2Co17	Sm2Co17-32H	/	1.10-1.13	11.0-11.3	812-860	10.2-10.8	≥1990	≥25	230-255	29-32	≤350	8.4
   	Sm2Co17-33H	/	1.13-1.15	11.3-11.5	830-880	10.4-11	≥1990	≥25	246-262	31-32	≤350	8.4
   Sm2Co17-TR	Sm2Co17-20TR	/	0.9-0.94	9.0-9.4	661-732	8.3-9.2	≥1592	≥20	143-159	18-20	≤500	8.4
   Sm2Co17-LT	Sm2Co17-16LT	/	0.81-0.85	8.1-8.5	605-669	7.6-8.4	≥1592	≥20	111-127	14-16	≤300	8.4
   	Sm2Co17-18LT	/	0.85-0.9	8.5-9.0	629-708	7.9-8.9	≥1592	≥20	127-143	16-18	≤300	8.4
   	Sm2Co17-20LT	/	0.9-0.94	9.0-9.4	661-732	8.3-9.2	≥1592	≥20	143-159	18-20	≤300	8.4
   	Sm2Co17-22LT	/	0.94-0.97	9.4-9.7	685-740	8.6-9.3	≥1592	≥20	159-175	20-22	≤300	8.4