Concrete Strength Calculator
Calculate concrete cube or cylinder compressive strength from specimen dimensions and maximum test load. The tool calculates loaded area and strength in MPa while preserving the distinction between the arithmetic result and project acceptance.
Concrete Strength Calculator
Enter specimen dimensions and maximum load to calculate compressive strength.
P = 900 kN × 1000 = 900,000 N
A = 150 × 150 = 22,500 mm²
f_c = 900,000 / 22,500 = 40.00 MPa
Calculation aid only. Concrete acceptance depends on the project specification, specimen/test standard, curing, test age and applicable acceptance criteria.
Record the original maximum machine load and specimen dimensions with the calculated MPa result.
How to use the Concrete Strength Calculator
Calculate the arithmetic compressive strength from the tested specimen geometry and the original maximum compression-machine load.
-
Choose the specimen
Select cube or cylinder and enter the cube side length or cylinder diameter in millimetres.
-
Enter the maximum load
Enter the maximum compression-machine load and confirm whether it is recorded in kN or N.
-
Read and record the result
Review the loaded area and compressive strength in MPa, and retain the original load and specimen dimensions with the calculated result.