Our MathQnA calculator instantly gives you 1 Pound Per Square Inch is 0.0069 Newton per Square Millimeter. Whether you’re addressing 1 Pound Per Square Inch can be expressed as 0.0069 Newton per Square Millimeter. you can adjust the values and units relevant to unit conversions to get precise results. This tool is designed for flexibility and ease of use, making it perfect for both academic inquiries and real-world calculations.