Convert between kilopascals and PSI with bidirectional conversion, bar/atm equivalents, and application reference table.
Kilopascals and psi are the most common metric-imperial pressure pair. Tire labels, compressors, pumps, and equipment manuals often show one or both, so this conversion comes up constantly in everyday maintenance and engineering work.
This converter handles both directions and also shows bar, atm, Pa, and mmHg. That makes it useful when one device or manual uses kPa and another uses psi, especially in automotive, HVAC, and fluid-system contexts. It also gives a quick bridge when a spec sheet, gauge, or test report needs to be checked against a different unit system. That is especially useful for tire inflation, shop air, and hydraulic settings where the same value may appear in more than one format.
Use it when you need to move quickly between a metric pressure reading and a psi-based target or specification. It is most helpful when you want one clean value before comparing against a sticker, manual, or setpoint.
kPa is standard across metric documentation, while psi remains common on US gauges and many consumer products. This page bridges the two directly and keeps the nearby pressure units visible for reference. It is handy whenever the same pressure has to be checked against both metric and US-style labels, especially for tires, compressors, and hydraulic setpoints.
kPa to psi: psi = kPa × 0.145038 psi to kPa: kPa = psi × 6.89476 kPa to bar: bar = kPa ÷ 100 kPa to atm: atm = kPa ÷ 101.325
Result: 31.91 psi
220 kPa × 0.145038 = 31.91 psi. This is a typical passenger car tire pressure (often recommended as 32 psi or 220 kPa).
North American tires display maximum pressure in both psi and kPa on the sidewall. However, the recommended pressure (found on the driver door sticker) may only show one unit. Typical values: compact cars 200-220 kPa (29-32 psi), sedans 220-240 kPa (32-35 psi), trucks/SUVs 240-280 kPa (35-41 psi).
ISO and metric engineering standards specify pressures in kPa, MPa, or bar. ASME and US standards use psi. When working with international projects, engineers must convert frequently between these systems.
Residential water pressure: 275-550 kPa (40-80 psi). Fire hydrant minimum: 1,380 kPa (200 psi). Hydraulic systems: 7,000-35,000 kPa (1,015-5,076 psi). Industrial hydraulic presses can exceed 70,000 kPa (10,153 psi).
200 kPa = 29.01 psi. That is slightly below the typical car tire pressure of 32 psi (220 kPa), so it is a useful checkpoint when reading mixed-unit labels.
Multiply kPa by 0.145038, or divide by 6.89476. For example, 300 kPa × 0.145038 = 43.51 psi, which is a common shop-air or hydraulic reference range.
Most passenger cars specify 200-250 kPa, which is about 29-36 psi. Check the sticker on your driver door jamb for the exact recommendation because the correct target depends on vehicle and load.
PSI is dominant in the US, while kPa is standard in Canada, Australia, and most metric countries. International standards often use kPa or bar, so the converter is useful when your sources do not match.
Municipal water pressure is typically 275-550 kPa, or about 40-80 psi. Low water pressure is below 207 kPa, while pressures above 550 kPa are often considered high for residential plumbing.
Multiply psi by 6.89476. For example, 32 psi × 6.89476 = 220.6 kPa, which is the same relationship used when converting tire specs to metric.