psi to MPa Converter - Pounds per Square Inch to Megapascal
Pounds per Square Inch (psi) to Megapascal (MPa)
Direct answer
1 psi = 0.00689476 MPa
MPa = psi × 0.00689476
Converter
Conversion formula
MPa = psi × 0.00689476
psi = MPa × 145.037680789
Example: 10 psi = 10 × 0.00689476 = 0.0689476 MPa.
Common conversion table
| psi | MPa |
|---|---|
| 1 psi | 0.00689476 MPa |
| 2 psi | 0.01378952 MPa |
| 5 psi | 0.0344738 MPa |
| 10 psi | 0.0689476 MPa |
| 20 psi | 0.1378952 MPa |
| 50 psi | 0.344738 MPa |
| 100 psi | 0.689476 MPa |
| 1,000 psi | 6.89476 MPa |
Conversion derivation
Express both psi and MPa in the same base unit Pa (pascal), then cancel the shared base unit.
- 1
Rewrite psi in the base unit
- 2
Rewrite MPa in the base unit
- 3
Forward conversion
- 4
Reverse conversion
AI explanation for this conversion
This pre-generated explanation is schema-checked. Numeric results still come from the page formula and calculator.
PSI to MPa Conversion Explanation
This conversion factor is derived by expressing both pressure units in terms of the base SI unit, the pascal (Pa). One psi is defined as 6,894.76 Pa, and one MPa is defined as 1,000,000 Pa. The factor is the ratio of these base unit equivalents.
Definition
Pounds per square inch (psi) is an imperial unit of pressure. The megapascal (MPa) is a metric unit of pressure, where one megapascal equals one million pascals.
Principle
The conversion works because both units measure the same physical quantity (pressure) and can be expressed in the same base unit. Dividing the base unit value of the source unit by the base unit value of the target unit yields the direct conversion factor.
Assumptions
- The conversion uses the standard definition: 1 psi = 6,894.76 Pa and 1 MPa = 1,000,000 Pa.
- Both units are defined at standard conditions and are exact within the context of this conversion.
Cautions
- The factor 0.00689476 is a rounded representation. For high-precision work, use the exact ratio from the base definitions.
- The FAQ advises rounding the converted result to the precision required by your specific calculation.
FAQ
How many MPa are in 1 psi?
1 psi = 0.00689476 MPa.
How many MPa are in 10 psi?
10 psi = 0.0689476 MPa.
How many MPa are in 100 psi?
100 psi = 0.689476 MPa.
What is the formula to convert psi to MPa?
Use MPa = psi × 0.00689476.
How many psi are in 1 MPa?
1 MPa = 145.037680789 psi.
What should I check when converting psi to MPa?
Use the conversion factor and round the result to the precision required by your calculation.