Vickers Hardness Number Calculator
Free calculate vickers hardness number (vhn) from indentation load and diagonal measurements. determine material hardness using the vickers test.
Input Parameters
Common: 1, 5, 10, 30, 50 kgf
Average of two diagonal measurements
Results
Enter load and diagonal to calculate VHN
Vickers Hardness Formula
Vickers Hardness Number
HV = 1.854 × F / d²
Where F = load (kgf), d = diagonal (mm)
Indentation Area
A = d² / 1.854
Surface area of indentation
Typical VHN Values
- • Soft steel: 100-200 HV
- • Hardened steel: 600-900 HV
- • Diamond: 8000-10000 HV
- • Glass: 500-600 HV
Advantages
- • Works for all materials
- • Wide load range
- • Accurate and repeatable
- • Small indentation