Steel Hardness Conversion calculator

This calculator shows approximate hardness of steel using Brinell, Rockwell (A, B, C, 15N) and Vickers scales. Values are approximate and for guidance only.

Steel Hardness Conversion Calculator
Brinell HB	Rockwell HRC	Rockwell HRB	Vickers HV	Rockwell HRA	Rockwell HR-15N	Action

Enter a value in any one box. If value is out of range, remaining boxes will stay blank.

Reference Table: Steel hardness conversion chart - all values approximate.
Brinell Hardness HB	Rockwell HRC	Rockwell HRB	Vickers HV	N/mm²

800	72
780	71
760	70
752	69
745	68
746	67
735	66
711	65
695	64
681	63
658	62
642	61
627	60
613	59
601	58		746
592	57		727
572	56		694
552	55		649
534	54	120	589
513	53	119	567
504	52	118	549
486	51	118	531
469	50	117	505
468	49	117	497
456	48	116	490	1569
445	47	115	474	1520
430	46	115	458	1471
419	45	114	448	1447
415	44	114	438	1422
402	43	114	424	1390
388	42	113	406	1363
375	41	112	393	1314
373	40	111	388	1265
360	39	111	376	1236
348	38	110	361	1187
341	37	109	351	1157
331	36	109	342	1118
322	35	108	332	1089
314	34	108	320	1049
308	33	107	311	1035
300	32	107	303	1020
290	31	106	292	990
277	30	105	285	971
271	29	104	277	941
264	28	103	271	892
262	27	103	262	880
255	26	102	258	870
250	25	101	255	853
245	24	100	252	838
240	23	100	247	824
233	22	99	241	794
229	21	98	235	775
223	20	97	227	755
216	19	96	222	716
212	18	95	218	706
208	17	95	210	696
203	16	94	201	680
199	15	93	199	667
191	14	92	197	657
190	13	92	186	648
186	12	91	184	637
183	11	90	183	617
180	10	89	180	608
175	9	88	178	685
170	7	87	175	559
167	6	86	172	555
166	5	86	168	549
163	4	85	162	539
160	3	84	160	535
156	2	83	158	530
154	1	82	152	515
149		81	149	500
147		80	147	490
143		79	146	482
141		78	144	481
139		77	142	480
137		76	140	475
135		75	137	467
131		74	134	461
127		72	129	451
121		70	127	431
116		68	124	422
114		67	121	412
111		66	118	402
107		64	115	382
105		62	112	378
103		61	108	373
95		56	104
90		52	95
81		41	85
76		37	80
Brinell HB	Rockwell HRC	Rockwell HRB	Vickers HV	N/mm²
3000kg 10mm Ball	150kg Brale	100kg 1/16" Ball	Diamond Pyramid 120kg	Tensile strength (Approx)
Reference table: Steel Hardness conversion chart Since the various types of hardness tests do not all measure the same combination of material properties, conversion from one hardness scale to another is only an approximate process. Because of the wide range of variation among different materials, it is not possible to state confidence limits for the errors in using a conversion chart.