180.5 Mohs = 1.77 HRC
| Mohs | HRC |
|---|---|
| 165.5 Mohs | 1.62 |
| 170.5 Mohs | 1.67 |
| 175.5 Mohs | 1.72 |
| 180.5 | 1.77 |
| 185.5 Mohs | 1.82 |
| 190.5 Mohs | 1.87 |
| 195.5 Mohs | 1.92 |
180.5 Mohs = 1.77 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