1. What is PSI to N/mm² Conversion?

PSI (pounds per square inch) and N/mm² (Newtons per square millimeter) are both units of pressure. The conversion between these units is important in engineering and scientific applications where different measurement systems are used.

2. How Does the Calculator Work?

The calculator uses the conversion formula:

Where:

• 1 PSI = 0.00689476 N/mm²
• 1 N/mm² = 145.038 PSI

Explanation: The conversion factor 145.038 comes from the relationship between pounds and Newtons, and square inches and square millimeters.

3. Importance of Pressure Unit Conversion

Details: Accurate pressure unit conversion is crucial in engineering design, material strength specifications, and when working with international standards that use different measurement systems.

4. Using the Calculator

Tips: Enter the PSI value you want to convert. The value must be positive. The calculator will automatically compute the equivalent N/mm² value.

5. Frequently Asked Questions (FAQ)

Q1: Why convert between PSI and N/mm²?
A: PSI is commonly used in the US customary system, while N/mm² is used in metric systems and many international standards.

Q2: How precise is this conversion?
A: The conversion factor 145.038 is precise to six decimal places, making it suitable for most engineering applications.

Q3: Are there other equivalent units?
A: Yes, 1 N/mm² is also equal to 1 MPa (Megapascal), another common metric pressure unit.

Q4: When is this conversion most needed?
A: Commonly needed when working with material specifications, hydraulic systems, or pressure vessel ratings that use different unit systems.

Q5: Can I convert N/mm² back to PSI?
A: Yes, simply multiply the N/mm² value by 145.038 to get the equivalent PSI value.