How the conversion works
Every pressure unit is a fixed multiple of the kilopascal, so converting between any two units is a single multiply-then-divide step through kPa.
- 1 psi — 6.894757 kPa
- 1 bar — 100 kPa
- 1 kgf/cm² — 98.0665 kPa
Common values
| Pressure (psi) | Result |
|---|---|
| 18 psi | 124.106 kPa |
| 35 psi | 241.317 kPa |
| 53 psi | 365.422 kPa |
| 70 psi | 482.633 kPa |
| 110 psi | 758.423 kPa |
More detail
Why kgf/cm² still shows up on placards
kgf/cm² (kilogram-force per square centimeter) was the standard pressure unit in many countries before kPa and psi became common, and it still appears on older gauges and some manufacturers' spec sheets — 1 kgf/cm² is fixed at exactly 98.0665 kPa by definition (based on standard gravity), so the conversion never drifts.
Measure cold. Always check pressure when the tires are cold — meaning the car has been parked for at least 3 hours, or driven less than about 1.6 km. Driving heats the air inside the tire and raises the reading by several psi, so a warm reading understates how much air you actually need to add.
Frequently asked questions
What is 35 psi in kPa?
35 psi × 6.894757 = 241.32 kPa. Enter your own value above for the exact figure at any pressure.
My gauge reads in kgf/cm² — how do I compare it to a psi spec?
Multiply the kgf/cm² reading by 98.0665 to get kPa, or divide by 0.070307 (≈ 6.894757/98.0665) to get psi directly. For example, 2.2 kgf/cm² ≈ 31.3 psi.
Why did my tire pressure read higher right after a long drive?
Friction and flexing heat the air inside a driven tire, which raises its pressure — often by 3–4 psi after highway driving. Let the tires cool for a few hours before adjusting pressure to your target value.