psi to kPa Converter

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Convert pounds per square inch to kilopascals at the rate 1 psi ≈ 6.895 kPa. Tire pressure: 32 psi ≈ 220.6 kPa, 35 psi ≈ 241.3 kPa, 50 psi ≈ 344.7 kPa. Standard atmospheric pressure (14.7 psi) is about 101.3 kPa. Useful when US automotive or hydraulic specs need to feed into a metric calculation that expects kPa. Browser-local.

Pound per square inch (psi)
Kilopascal (kPa)

Pound per square inch (psi) → Kilopascal (kPa)

Quick reference table

Pound per square inch (psi)Kilopascal (kPa)
15 psi103.4214 kPa
20 psi137.8951 kPa
25 psi172.3689 kPa
30 psi206.8427 kPa
32 psi220.6322 kPa
35 psi241.3165 kPa
40 psi275.7903 kPa
50 psi344.7379 kPa
100 psi689.4757 kPa

Glossary

Pound per square inch (psi)

A pound-force per square inch equals 6,894.76 Pa. It is the dominant pressure unit in US automotive and engineering: tire pressure (32 psi = 2.21 bar), hydraulic systems (1,000–3,000 psi), bicycle tires (60–120 psi), municipal water (60 psi typical). Standard atmospheric pressure is 14.696 psi. The unit is sometimes split as psi-g (gauge, above atmospheric) and psi-a (absolute).

Kilopascal (kPa)

A kilopascal equals 1,000 pascals. It is the everyday metric pressure unit for tire pressure outside the US (32 psi ≈ 220 kPa), atmospheric pressure (~101 kPa at sea level), HVAC duct pressure and blood-pressure readings reported in metric form (120/80 mmHg ≈ 16.0/10.7 kPa). The standard atmosphere equals 101.325 kPa exactly.

Metric / SI pressure

In the metric system, pressure is reported in pascals (SI base) or its multiples — kilopascal (kPa, 10³ Pa), megapascal (MPa, 10⁶ Pa) — and the related non-SI unit bar (10⁵ Pa). The millibar/hectopascal (mbar = hPa = 100 Pa) is used in meteorology. All metric units relate by exact powers of ten, so conversions between them are simple shifts of decimal point.

Imperial / US pressure

US engineering and automotive primarily report pressure in pounds per square inch (psi). 1 psi ≈ 6,894.76 Pa, defined as one pound-force per square inch. Standard atmospheric pressure is 14.696 psi. The closely related "psi-gauge" (psi-g) measures pressure above atmospheric, while "psi-absolute" (psi-a) measures total pressure including atmospheric.

Related tools

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