Reference table

Tyre pressure: bar, psi and kPa

Vehicle manuals state bar, inflators often show psi or kPa. This table converts the same pressure reading into each unit — without recommending a value for any specific vehicle.

Tyre pressure: bar, psi and kPa
bar	psi	kPa	hPa
1.8	26.10679279 psi	180 kPa	1,800 hPa
2	29.00754755 psi	200 kPa	2,000 hPa
2.2	31.9083023 psi	220 kPa	2,200 hPa
2.4	34.80905706 psi	240 kPa	2,400 hPa
2.5	36.25943443 psi	250 kPa	2,500 hPa
2.6	37.70981181 psi	260 kPa	2,600 hPa
2.8	40.61056656 psi	280 kPa	2,800 hPa
3	43.51132132 psi	300 kPa	3,000 hPa
3.2	46.41207607 psi	320 kPa	3,200 hPa

The correct tyre pressure is stated in the vehicle manual, on the fuel flap or the door pillar and depends on load and tyre size. This table is a pure unit conversion, not a recommendation. All values are absolute pressures in the given unit; inflators usually display gauge pressure relative to the atmosphere.

Sources

BIPM SI BrochureSI base units, prefixes and official SI context.NIST Guide to SI Appendix BNIST conversion-factor method and non-SI factors.

Matching conversions

bar to psibar → psiPressure psi to barpsi → barPressure Kilopascal to psikPa → psiPressure Atmosphere to baratm → barPressure