psi to MPa Converter (Pounds/in² to Megapascals)
Convert concrete compressive strength (f'c), tensile cracking stress, and soil bearing capacity from psi to MPa.
psi to MPa Conversion Formula
To convert any value in Pounds per Square Inch (lb/in²) (psi) to Megapascal (N/mm²) (MPa), multiply the quantity by the exact factor 0.006894757293.
psi to MPa Conversion Chart
| psi (Pounds per Square Inch (lb/in²)) | MPa (Megapascal (N/mm²)) | Conversion Ratio |
|---|---|---|
| 500 psi | 3.44738 MPa | 1 psi = 0.00689 MPa |
| 1,000 psi | 6.89476 MPa | 1 psi = 0.00689 MPa |
| 1,500 psi | 10.3421 MPa | 1 psi = 0.00689 MPa |
| 2,000 psi | 13.7895 MPa | 1 psi = 0.00689 MPa |
| 2,500 psi | 17.2369 MPa | 1 psi = 0.00689 MPa |
| 3,000 psi | 20.6843 MPa | 1 psi = 0.00689 MPa |
| 3,500 psi | 24.1317 MPa | 1 psi = 0.00689 MPa |
| 4,000 psi | 27.579 MPa | 1 psi = 0.00689 MPa |
| 4,500 psi | 31.0264 MPa | 1 psi = 0.00689 MPa |
| 5,000 psi | 34.4738 MPa | 1 psi = 0.00689 MPa |
| 6,000 psi | 41.3685 MPa | 1 psi = 0.00689 MPa |
| 7,000 psi | 48.2633 MPa | 1 psi = 0.00689 MPa |
| 8,000 psi | 55.1581 MPa | 1 psi = 0.00689 MPa |
| 10,000 psi | 68.9476 MPa | 1 psi = 0.00689 MPa |
Structural Engineering Application
Concrete compressive strength in the US is universally specified in psi (e.g. 3,000 psi, 4,000 psi, 5,000 psi, 6,000 psi). International concrete grades are specified in MPa (e.g. C25/30, C30/37).
Common Conversion Mistake
In ACI 318, equations with √f'c assume f'c is entered in psi, yielding answers in psi. When using metric ACI 318M, √f'c is in MPa and produces MPa with different numerical coefficients (e.g. 2√f'c becomes 0.17√f'c).
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