Hardness Converter
Convert between Vickers (HV), Brinell (HB), Rockwell B (HRB), and Rockwell C (HRC) hardness scales using ASTM E140 approximations.
Reviewed October 7, 2026 Runs in your browser — inputs are never stored
Approximate conversion via tensile strength (ASTM E140). Exact conversions require material-specific tables.
Brinell (HB)
173.9
This tool provides general unit conversions for everyday and educational use. For regulated, legal, or scientific applications, verify conversion factors against the applicable official standard.
About the Hardness Converter
The hardness converter estimates equivalent values between the Vickers (HV), Brinell (HB), Rockwell B (HRB) and Rockwell C (HRC) hardness scales using standard conversion tables in the style of ASTM E140. Each test uses a different indenter and load, so conversions are approximate and only valid within each scale’s range; for critical work, test with the required method.
How to use it
- 1Enter the measured hardness value.
- 2Choose the scale it was measured on.
- 3Choose the scale you want and read the approximate equivalent.
Worked example
a steel measuring 200 HV is roughly 190 HB in Brinell hardness.
How it works
Hardness scales
Vickers (HV): Diamond pyramid indenter, suitable for all materials.
Brinell (HB): Ball indenter, for soft to medium-hard materials.
Rockwell C (HRC): For hard steels, typically 20–70 HRC.
Rockwell B (HRB): For softer metals, 0–100 HRB.
Common use cases
- Comparing material specifications
- Quality control in metalworking
- Reading supplier data sheets
Frequently asked questions
A:60 HRC ≈ 746 HV (approximate via ASTM E140). Use official tables for precision.
A:Vickers (HV) is the most universal — it works for all materials and hardness ranges using the same formula.
Reviewed for accuracy · Last updated October 7, 2026
Conversion factors are based on internationally defined SI units and standard metric/imperial equivalence tables.
CalcWisee Editorial Team
Calculator development and formula review
CalcWisee is an independent site founded by Ayman. Every calculator is built from a published formula or official definition, tested against hand-worked examples before it goes live, and corrected promptly when a reader reports an issue to ayman@calcwisee.com.
Expertise: Financial mathematics, Health and fitness formulas, Applied mathematics, Unit conversion standards
References & sources
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