1 Pound/sq inch to Newton/sq mm
Quick answer
1 Pound/sq inch (psi) equals
0.006895 N/mm²
To convert 1 Pound/sq inches to Newton/sq mms, multiply by 0.0068947573. Therefore, 1 Pound/sq inch (psi) equals 0.006895 Newton/sq mm (N/mm²).
Formula: N/mm² = psi × 0.0068947573. Calculation: 1 × 0.0068947573 = 0.006895 N/mm².
Convert Pound/sq inch (psi) to Newton/sq mm (N/mm²) online with our free unit converter. In pressure, 1 psi = 0.006895 N/mm². Explore step-by-step conversion steps, mathematical formulas, and quick conversion reference tables below.
Worked example: converting Pound/sq inch to Newton/sq mm
- Step 1 — start with the formula. N/mm² = psi × 0.0068947573
- Step 2 — substitute your figure. 1 psi × 0.0068947573
- Step 3 — read the result. 1 psi = 0.006895 N/mm²
- Step 4 — check it in reverse. psi = N/mm² × 145.0377377302 returns 1 psi, which matches the figure you started with.
Pressure Converter
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1 psi = 0.006895 N/mm²
Formula:
N/mm² = psi × 0.0068947573With your value: 1 psi = 0.00689476 N/mm²
Other Pound/sq inch to Newton/sq mm conversions
Pound/sq inch to Newton/sq mm Conversion Table
| Pound/sq inch (psi) | Newton/sq mm (N/mm²) |
|---|---|
| 0.5 | 0.003447 |
| 1 | 0.006895 |
| 2 | 0.01379 |
| 5 | 0.034474 |
| 10 | 0.068948 |
| 15 | 0.103421 |
| 20 | 0.137895 |
| 25 | 0.172369 |
| 50 | 0.344738 |
| 100 | 0.689476 |
| 250 | 1.723689 |
| 500 | 3.447379 |
| 1000 | 6.894757 |
Newton/sq mm to Pound/sq inch Conversion Table
| Newton/sq mm (N/mm²) | Pound/sq inch (psi) |
|---|---|
| 0.5 | 72.518869 |
| 1 | 145.037738 |
| 2 | 290.075475 |
| 5 | 725.188689 |
| 10 | 1,450.377377 |
| 15 | 2,175.566066 |
| 20 | 2,900.754755 |
| 25 | 3,625.943443 |
| 50 | 7,251.886887 |
| 100 | 14,503.773773 |
| 250 | 36,259.434433 |
| 500 | 72,518.868865 |
| 1000 | 145,037.73773 |
Where these values come from
Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.
Pound/sq inch (psi)
Pressure
1 psi = 1 lbf/in² = 6894.757 293 168 361 Pa exactly.
Source: NIST Special Publication 811, Guide for the Use of the International System of Units
National Institute of Standards and Technology (US) · Reviewed 2026-07-01
Newton/sq mm (N/mm²)
Pressure
Derived from the pascal (1 Pa = 1 N/m²). The standard atmosphere is exactly 101 325 Pa.
Source: NIST Special Publication 811, Guide for the Use of the International System of Units
National Institute of Standards and Technology (US) · Reviewed 2026-07-01
How to Convert Pound/sq inch to Newton/sq mm
To convert from Pound/sq inch (psi) to Newton/sq mm (N/mm²), multiply the value by 0.0068947573.
Formula: N/mm² = psi × 0.0068947573
Reverse: psi = N/mm² × 145.0377377302
Step-by-Step Example
- Start with your value in Pound/sq inch. For example: 5 psi
- Multiply by the conversion factor: 5 x 0.0068947573
- The result is: 0.034474 N/mm²
Pound/sq inch and Newton/sq mm Relationship
This conversion bridges the US Customary / Imperial and Metric (SI) measurement systems, commonly required when translating scientific data, international engineering specifications, or trade standards. Since 1 Pound/sq inch represents a fraction of a Newton/sq mm (1 Newton/sq mm ≈ 145.0377 Pound/sq inches), the Newton/sq mm is the larger measurement interval. Understanding the relationship between Pound/sq inch and Newton/sq mm is essential for accurate calculations in physics, engineering, commerce, and daily applications.
About Pound/sq inch
Pounds per square inch (psi) is an imperial unit of pressure widely used in the US for tire pressure, hydraulics, and engineering.
Common uses of Pound/sq inch: tire pressure (US), hydraulics, HVAC.
About Newton/sq mm
The Newton/sq mm (symbol: N/mm²) is a recognized unit in the Metric (SI) measurement framework, utilized within pressure applications for precision and standardized data representation.
Common uses of Newton/sq mm: pressure calculations, engineering and science, education.
Frequently Asked Questions
- What is 1 Pound/sq inch in Newton/sq mm?
- 1 Pound/sq inch equals 0.006895 Newton/sq mm.
- How many Newton/sq mms are in 1 Pound/sq inch?
- There are exactly 0.0068947573 Newton/sq mms in 1 Pound/sq inch. This means the conversion factor from Pound/sq inch to Newton/sq mm is 0.0068947573.
- What is the formula to convert Pound/sq inch to Newton/sq mm?
- The formula to convert Pound/sq inch to Newton/sq mm is: N/mm² = psi × 0.0068947573. For example, to convert 10 Pound/sq inches to Newton/sq mms, you would multiply 10 by 0.0068947573.
- What is a Pound/sq inch?
- Pounds per square inch (psi) is an imperial unit of pressure widely used in the US for tire pressure, hydraulics, and engineering.
- What is a Newton/sq mm?
- The Newton/sq mm (symbol: N/mm²) is a recognized unit in the Metric (SI) measurement framework, utilized within pressure applications for precision and standardized data representation.
- What are the common uses of Pound/sq inch?
- The Pound/sq inch is commonly used in tire pressure (US), hydraulics, HVAC.
Related Pressure Conversions
Cite this page
UnitConvertLab. (2026). 1 Pound/sq inch to Newton/sq mm. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/1-psi-to-newton_per_sqmm