637.5 HRB = 1,147.5 HV
| HRB | HV |
|---|---|
| 622.5 HRB | 1,120.5 |
| 627.5 HRB | 1,129.5 |
| 632.5 HRB | 1,138.5 |
| 637.5 HRB | 1,147.5 |
| 642.5 HRB | 1,156.5 |
| 647.5 HRB | 1,165.5 |
| 652.5 HRB | 1,174.5 |
637.5 HRB = 1,147.5 HV
1 HRC ≈ 10.2 HV · 1 HRB ≈ 1.8 HV · 1 Mohs ≈ 0.1 HV — approximate; real conversions vary by material per ASTM E140