PSI to kPa Converter

How to convert pounds per square inch to kilopascals

1 pound per square inch = 6.894757293 kilopascals. To convert pounds per square inch to kilopascals, multiply by 6.894757293. One psi is one pound-force on one square inch, exactly 6,894.757293168 Pa. A kilopascal is 1,000 pascals; standard atmospheric pressure is 101.325 kPa.

Worked examples

• 32 pounds per square inch = 220.632 kPa (32 × 6.8947573)
• 100 pounds per square inch = 689.476 kPa (100 × 6.8947573)
• 3,000 pounds per square inch = 20,684.3 kPa (3,000 × 6.8947573)

Where this conversion comes up

Pounds per square inch are used for tire pressure, compressors and plumbing in the US; kilopascals for tire pressure outside the US, weather and engineering. Multiply by 6.895: 32 psi is 220.6 kPa, 100 psi is 689.5 kPa and 3,000 psi is 20,684 kPa (20.7 MPa). Tire pressures of 30–35 psi correspond to 207–241 kPa.

Quick estimate

Multiply by 7 (1.5% high), or by 6.9.

Common mistakes

• Dividing instead of multiplying. A kilopascal is smaller than a pound per square inch, so the number of kilopascals must come out larger: 32 pounds per square inch = 220.632 kPa.
• Rounding too early. Keep the full factor until the last step; rounding 6.89 to 6.9 first puts large values noticeably off.

Going the other way? Use the kpa to psi converter. Related pressure converters: bar to psi, psi to bar, mpa to psi, psi to mpa.