277.5 Mohs = 2.72 HRC
| Mohs | HRC |
|---|---|
| 262.5 Mohs | 2.57 |
| 267.5 Mohs | 2.62 |
| 272.5 Mohs | 2.67 |
| 277.5 | 2.72 |
| 282.5 Mohs | 2.77 |
| 287.5 Mohs | 2.82 |
| 292.5 Mohs | 2.87 |
277.5 Mohs = 2.72 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