How to convert kilopascals to pounds per square inch
Formula: psi = kPa × 0.145038
Worked example: 250 kPa → 250 × 0.145038 = 36.2594 psi
Divide kilopascals by 6.89476. A placard reading 240 kPa means about 34.8 psi. Remember that tire gauges show the pressure above atmospheric, so both values are gauge pressures.
Kilopascals to pounds per square inch conversion chart
| Kilopascals (kPa) | Pounds per square inch (psi) |
|---|---|
| 1 kPa | 0.145038 psi |
| 2 kPa | 0.290075 psi |
| 3 kPa | 0.435113 psi |
| 4 kPa | 0.580151 psi |
| 5 kPa | 0.725189 psi |
| 6 kPa | 0.870226 psi |
| 7 kPa | 1.01526 psi |
| 8 kPa | 1.1603 psi |
| 9 kPa | 1.30534 psi |
| 10 kPa | 1.45038 psi |
| 12 kPa | 1.74045 psi |
| 15 kPa | 2.17557 psi |
| 20 kPa | 2.90075 psi |
| 25 kPa | 3.62594 psi |
| 30 kPa | 4.35113 psi |
| 40 kPa | 5.80151 psi |
| 50 kPa | 7.25189 psi |
| 75 kPa | 10.8778 psi |
| 100 kPa | 14.5038 psi |
| 250 kPa | 36.2594 psi |
| 500 kPa | 72.5189 psi |
| 1,000 kPa | 145.038 psi |
What is a kilopascal?
The kilopascal equals 1,000 pascals. Canadian and many European car manuals give tire pressures in kPa, for example 240 kPa, which is about 35 psi. It is also used in engineering and for blood pressure in some medical texts.
What is a pound per square inch?
The pound per square inch is the US unit of pressure, about 6,894.76 pascals. Car tires are usually inflated to 30 to 35 psi, and sea-level air pressure is 14.7 psi. Gauges often read psig, the pressure above atmospheric.