Home / Engineering Tools / Concrete, Brick & Steel Tests
Rebound Hammer
Estimate concrete strength from Schmidt rebound hammer readings, with outlier removal and calibration.
Loading the calculator… (JavaScript is needed)
About this test
Enter 10 rebound readings at a location.
How it's calculated
- Discard readings > 6 from the average (ASTM C805)
Results are calculated from the values you enter using standard formulas. Download the PDF to keep a record. For certified testing, design or construction, talk to our engineers.
Cite this tool
Kataria Engineering & Consultancy Services (2026). Rebound Hammer [online calculator]. https://katariaengineering.com/tools/rebound-hammer-test.html
Need an engineer for your project?
Testing, design and construction across Azad Kashmir & Punjab. Call or WhatsApp us.