Quick Answer
- kPa to psi: divide by 6.895 or multiply by 0.14504. 230 kPa = 33.4 psi, 240 kPa = 34.8 psi, 250 kPa = 36.3 psi.
- A tire gauge and a TPMS display read gauge pressure, so kPag converts with the same factor. 100 kPa = 1 bar.
- Use the pressure on your door-jamb placard or in the owner's manual, and measure when the tires are cold (NHTSA: not driven for at least three hours).
Type in any box and the other two update. Tire pressure is gauge pressure, so the same factor applies to kPag.
240 kPa in PSI
34.81
34.8091 psi
In bar
2.40
0.2400 MPa
In atmospheres
2.369
240,000 Pa
Working
PSI = kPa / 6.894757 = 240 / 6.894757 = 34.809
Factor from NIST SP 811. Owner's manuals round the psi figure, so a manual can print a slightly different number than the exact conversion.
Get a plain-English explanation of your results and what they mean for your vehicle.
kPa to PSI Chart for Tire Pressure: 150 to 350 kPa
Every 5 kPa, converted with 1 psi = 6.894757 kPa. Find your pressure in the first column of any block.
| kPa | PSI | Bar |
|---|---|---|
| 150 | 21.76 | 1.50 |
| 155 | 22.48 | 1.55 |
| 160 | 23.21 | 1.60 |
| 165 | 23.93 | 1.65 |
| 170 | 24.66 | 1.70 |
| 175 | 25.38 | 1.75 |
| 180 | 26.11 | 1.80 |
| 185 | 26.83 | 1.85 |
| 190 | 27.56 | 1.90 |
| 195 | 28.28 | 1.95 |
| 200 | 29.01 | 2.00 |
| 205 | 29.73 | 2.05 |
| 210 | 30.46 | 2.10 |
| 215 | 31.18 | 2.15 |
| kPa | PSI | Bar |
|---|---|---|
| 220 | 31.91 | 2.20 |
| 225 | 32.63 | 2.25 |
| 230 | 33.36 | 2.30 |
| 235 | 34.08 | 2.35 |
| 240 | 34.81 | 2.40 |
| 245 | 35.53 | 2.45 |
| 250 | 36.26 | 2.50 |
| 255 | 36.98 | 2.55 |
| 260 | 37.71 | 2.60 |
| 265 | 38.44 | 2.65 |
| 270 | 39.16 | 2.70 |
| 275 | 39.89 | 2.75 |
| 280 | 40.61 | 2.80 |
| 285 | 41.34 | 2.85 |
| kPa | PSI | Bar |
|---|---|---|
| 290 | 42.06 | 2.90 |
| 295 | 42.79 | 2.95 |
| 300 | 43.51 | 3.00 |
| 305 | 44.24 | 3.05 |
| 310 | 44.96 | 3.10 |
| 315 | 45.69 | 3.15 |
| 320 | 46.41 | 3.20 |
| 325 | 47.14 | 3.25 |
| 330 | 47.86 | 3.30 |
| 335 | 48.59 | 3.35 |
| 340 | 49.31 | 3.40 |
| 345 | 50.04 | 3.45 |
| 350 | 50.76 | 3.50 |
To go the other way, use the PSI to kPa and bar converter.
Other kPa to PSI Values
Low values (vacuum and gauge readings) and high values (heavy tires and equipment).
| kPa | PSI | Bar |
|---|---|---|
| 1 | 0.145 | 0.010 |
| 3 | 0.435 | 0.030 |
| 5 | 0.725 | 0.050 |
| 10 | 1.450 | 0.100 |
| 15 | 2.176 | 0.150 |
| 20 | 2.90 | 0.20 |
| 23 | 3.34 | 0.23 |
| 35 | 5.08 | 0.35 |
| 36 | 5.22 | 0.36 |
| 50 | 7.25 | 0.50 |
| 76 | 11.02 | 0.76 |
| 100 | 14.50 | 1.00 |
| 140 | 20.31 | 1.40 |
| 400 | 58.02 | 4.00 |
| 420 | 60.92 | 4.20 |
| 450 | 65.27 | 4.50 |
| 475 | 68.89 | 4.75 |
| 500 | 72.52 | 5.00 |
| 600 | 87.02 | 6.00 |
| 700 | 101.53 | 7.00 |
| 1000 | 145.04 | 10.00 |
| 1500 | 217.56 | 15.00 |
| 2400 | 348.09 | 24.00 |
What Owner's Manuals Print for kPa and PSI
Manuals round the psi figure, so the printed number can differ from the exact conversion by a fraction of a psi, and the same kPa can be printed differently in different market lists.
| Manual | kPa | Printed psi | Exact conversion |
|---|---|---|---|
| Mazda CX-5 2024 (US and Canada) | 230 | 34 | 33.36 |
| Mazda CX-5 2024 (Mexico list) | 230 | 33 | 33.36 |
| Mazda CX-5 2024 | 240 | 35 | 34.81 |
| Mazda CX-5 2024 | 250 | 36 | 36.26 |
| Mazda CX-5 2024 | 260 | 38 | 37.71 |
| Mazda CX-5 2024 | 275 | 40 | 39.89 |
| Mazda CX-5 2024 | 280 | 41 | 40.61 |
| Mazda CX-5 2024 | 290 | 42 | 42.06 |
| Jeep Grand Cherokee 2025 | 248 | 36 | 35.97 |
| Jeep Grand Cherokee 2025 | 165 | 24 | 23.93 |
| Jeep Grand Cherokee 2025 | 96 | 14 | 13.92 |
Cold pressure, hot pressure and temperature
| Source | Statement |
|---|---|
| NHTSA | Check tire pressure when the tires are cold, meaning the vehicle has not been driven for at least three hours. The correct pressure is on the placard in the driver's door jamb or in the owner's manual. |
| Ford F-150 2025 manual | If pressure is checked after the tires have been driven more than three minutes or more than 1 mile (2 km), the tires are hot and pressure will have increased by approximately 4 psi (27.6 kPa). |
| Jeep Grand Cherokee 2025 manual | Tire pressure may increase 2 to 6 psi (13 to 40 kPa) during operation, and you should not reduce this normal buildup. Pressure changes about 1 psi (7 kPa) for every 12 degrees F (6.5 degrees C) of temperature change. |
| Jeep Grand Cherokee 2025 manual | The tire pressure monitoring display can be set to show pressure in psi, bar or kPa. |
| Mazda CX-5 2024 manual | The tire pressure label shows the recommended inflation pressure in both kPa and psi, and the pressure in the specification table can differ by market. |
A tire pressure calculator works with the pressure you settle on, and the contact patch estimate at a given pressure shows what pressure does to the footprint.
kPa to PSI Formula, kPag and Boost
kPa to PSI
PSI = kPa / 6.894757, or kPa x 0.145038. For 240 kPa: 240 / 6.894757 = 34.809 psi.
PSI to kPa
kPa = PSI x 6.894757. For 35 psi: 35 x 6.894757 = 241.3 kPa.
kPa to bar
bar = kPa / 100. For 240 kPa: 2.40 bar. 1 bar = 14.504 psi.
Gauge and absolute
A tire gauge or a car display reads gauge pressure (kPag), pressure above the surrounding air, so kPag converts with the same factor. Absolute pressure includes one atmosphere (101.325 kPa), so subtract it first.
Boost from a MAP reading
Boost psi = (MAP kPa - ambient kPa) / 6.894757. For a MAP of 207 kPa at sea level: (207 - 101.325) / 6.894757 = 15.33 psi.
Quick estimate
Divide by 7 for a rough psi figure (240 / 7 = 34), or multiply by 0.145 for a close one (240 x 0.145 = 34.8).
Source: NIST Special Publication 811, Appendix B.9 (pound-force per square inch = 6.894 757 kPa).
How to Change Your Car from kPa to PSI
It is a setting in the vehicle display, and the menu differs by make and model. These are the manuals we hold that describe it.
| Manual | Setting |
|---|---|
| Toyota Tacoma 2024 manual | Park the vehicle (the unit cannot be changed while moving), turn the engine switch to ON, then use the meter control switches to open Vehicle Settings, then TPWS, then Pressure unit setting, and select the unit. |
| Jeep Grand Cherokee 2025 manual | The tire pressure monitoring system can be set to display psi, bar or kPa (the manual describes this in the tire pressure monitoring section and the instrument cluster settings). |
For any other vehicle, look up tire pressure monitoring units in your owner's manual.
How to Use the kPa to PSI Calculator
- 1In the converter, type the pressure in kPa, psi or bar. The other two boxes update as you type.
- 2Tap a preset such as 240 kPa to load a common tire pressure, and read the psi, bar, MPa and atmosphere values below.
- 3For a manifold pressure reading, open MAP kPa to Boost PSI, enter the absolute reading and the ambient pressure, and read the gauge boost.
- 4Compare the result with the pressure on your tire placard, and remember that manuals round the psi figure.