158.5 Mohs = 1.55 HRC
| Mohs | HRC |
|---|---|
| 143.5 Mohs | 1.41 |
| 148.5 Mohs | 1.46 |
| 153.5 Mohs | 1.5 |
| 158.5 | 1.55 |
| 163.5 Mohs | 1.6 |
| 168.5 Mohs | 1.65 |
| 173.5 Mohs | 1.7 |
158.5 Mohs = 1.55 HRC
1 HRC ≈ 10.2 HV · 1 HRB ≈ 1.8 HV · 1 Mohs ≈ 0.1 HV — approximate; real conversions vary by material per ASTM E140