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 physics 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 testing, 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 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. Conversion is needed when working with international standards or equipment.

Q2: How precise is this conversion?
A: The conversion factor is precise to six decimal places (145.0377377), but for most practical applications, 145.038 is sufficient.

Q3: Are there other common pressure units?
A: Yes, other units include bar, kPa, MPa, atm, and mmHg, each used in different contexts.

Q4: Is N/mm² the same as MPa?
A: Yes, 1 N/mm² is exactly equal to 1 MPa (megapascal), as 1 MPa = 1,000,000 N/m² = 1 N/mm².

Q5: When would I need this conversion?
A: Common applications include material strength specifications, hydraulic system pressures, and structural engineering calculations.