1. What is MPa to PSI Conversion?

Definition: This calculator converts pressure values from megapascals (MPa) to pounds per square inch (PSI).

Purpose: It helps engineers, technicians, and professionals working with pressure measurements in different unit systems.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( \text{PSI} \) — Pressure in pounds per square inch
• \( \text{MPa} \) — Pressure in megapascals
• \( 145.038 \) — Conversion factor (exact value)

Explanation: 1 MPa equals approximately 145.038 PSI. This conversion factor is derived from the exact relationship between the pascal and pound-force units.

3. Importance of Pressure Conversion

Details: Accurate pressure conversion is crucial in fields like engineering, hydraulics, pneumatics, and material testing where different measurement systems are used.

4. Using the Calculator

Tips: Simply enter the pressure value in megapascals (MPa) and the calculator will automatically compute the equivalent in pounds per square inch (PSI).

5. Frequently Asked Questions (FAQ)

Q1: What is MPa?
A: MPa stands for megapascal, a metric unit of pressure equal to 1,000,000 pascals or approximately 145 PSI.

Q2: What is PSI?
A: PSI stands for pounds per square inch, an imperial unit of pressure commonly used in the United States.

Q3: Why is the conversion factor 145.038?
A: This exact value comes from the definition of 1 pound-force = 4.44822 newtons and 1 inch = 0.0254 meters.

Q4: When would I need to convert MPa to PSI?
A: When working with international standards (MPa) but needing to communicate with US-based colleagues or using equipment calibrated in PSI.

Q5: Can I convert PSI to MPa with this calculator?
A: This calculator is one-directional (MPa to PSI). For reverse conversion, use PSI = MPa × 145.038 or MPa = PSI ÷ 145.038.