644.5 HRC = 6,573.9 HV
| HRC | HV |
|---|---|
| 629.5 HRC | 6,420.9 |
| 634.5 HRC | 6,471.9 |
| 639.5 HRC | 6,522.9 |
| 644.5 | 6,573.9 |
| 649.5 HRC | 6,624.9 |
| 654.5 HRC | 6,675.9 |
| 659.5 HRC | 6,726.9 |
644.5 HRC = 6,573.9 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