Kilopascals to PSI Converter
1 kPa = 0.145038 psi. Atmospheric pressure = 101.325 kPa = 14.696 psi. Car tires: 207–248 kPa.
Inverse conversion
1 psi = 6.89476 kPa. Atmospheric pressure = 14.696 psi = 101.325 kPa. Tire pressure: 30–36 psi.
Formula
Formula
psi = kPa × 0.145038
Worked example
A tire inflated to 220 kPa: 220 × 0.145038 = 31.91 psi.
Quick reference table
| kPa | psi |
|---|---|
| 10 | 1.450377 |
| 20 | 2.900755 |
| 50 | 7.251887 |
| 100 | 14.503774 |
| 200 | 29.007548 |
| 300 | 43.511321 |
| 500 | 72.518869 |
| 1000 | 145.037738 |
Unit definitions
Kilopascal (kPa)
The kilopascal (kPa) = 1,000 Pa. Standard unit for tire pressure in metric-using countries. Normal atmospheric pressure ≈ 101.325 kPa.
PSI (psi)
PSI (pounds per square inch) = lbf/in². The standard pressure unit in the US for tire pressure, hydraulics, and compressed air.
Common use cases
- Tire pressure: metric countries use kPa, US uses psi
- Blood pressure (kPa in clinical contexts)
- HVAC and refrigeration systems
- Hydraulic system specifications