1. What is N/mm² to psi Conversion?

The conversion from newtons per square millimeter (N/mm²) to pounds per square inch (psi) is a common calculation in engineering and physics, particularly in materials science and pressure measurement applications.

2. How Does the Calculator Work?

The calculator uses the conversion formula:

Where:

• \( \text{N/mm²} \) — Pressure in newtons per square millimeter
• \( 1000000 \) — Conversion factor (1 N/mm² = 1,000,000 N/m²)
• \( 6894.76 \) — Conversion factor (1 psi = 6894.76 N/m²)

Explanation: This formula converts pressure from the metric unit (N/mm²) to the imperial unit (psi) commonly used in the United States and some other countries.

3. Importance of Pressure Unit Conversion

Details: Accurate pressure unit conversion is essential in international engineering projects, material specifications, and when working with equipment that uses different measurement systems.

4. Using the Calculator

Tips: Enter the pressure value in N/mm². The value must be a positive number. The calculator will automatically convert it to psi.

5. Frequently Asked Questions (FAQ)

Q1: Why is the conversion factor 6894.76?
A: This value comes from the definition of psi: 1 psi equals 1 pound-force per square inch, which is equivalent to approximately 6894.76 pascals (N/m²).

Q2: What is the relationship between N/mm² and MPa?
A: 1 N/mm² is exactly equal to 1 MPa (megapascal), as both represent 1,000,000 pascals.

Q3: In which industries is this conversion commonly used?
A: This conversion is frequently used in automotive, aerospace, construction, and materials engineering where pressure specifications may use different unit systems.

Q4: How accurate is this conversion?
A: The conversion is mathematically exact based on the defined relationship between the units. The calculator provides results with two decimal places for practical use.

Q5: Can I convert psi back to N/mm²?
A: Yes, the reverse conversion is: N/mm² = (psi × 6894.76) / 1000000