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kPa to PSI

Convert kPa to PSI

"kPa to PSI" Calculator

How to convert kilopascals to pounds per square inch

Worked example: 250 kPa ≈ 36.26 psi

250 kPa × 0.64516 ÷ 4.4482216152605 ≈ 36.26 psi

0.64516 = 1,000 Pa in a kilopascal × 0.00064516 m² in a square inch; 4.4482216152605 N in a pound-force

Rule: pounds per square inch = kilopascals × 0.64516 ÷ 4.4482216152605 ≈ kilopascals ÷ 6.89476 — 1 psi = 1 lbf/in².

Most asked values
Kilopascals	Pounds per square inch
1 kPa	0.15 psi
50 kPa	7.25 psi
100 kPa	14.5 psi
108 kPa	15.66 psi
150 kPa	21.76 psi
200 kPa	29.01 psi
220 kPa	31.91 psi
225 kPa	32.63 psi
230 kPa	33.36 psi
240 kPa	34.81 psi
250 kPa	36.26 psi
280 kPa	40.61 psi
300 kPa	43.51 psi
350 kPa	50.76 psi
400 kPa	58.02 psi
500 kPa	72.52 psi
600 kPa	87.02 psi
1,000 kPa	145.04 psi

See Also

Bar to PSI - Convert Bar to PSI
PSI to Bar - Convert PSI to Bar
MPa to kgf/cm² - Convert MPa to kgf/cm²
Newton-Meters to Foot-Pounds - Convert Newton-Meters to Foot-Pounds
Foot-Pounds to Newton-Meters - Convert Foot-Pounds to Newton-Meters
Newton-Meters to Inch-Pounds - Convert Newton-Meters to Inch-Pounds
Inch-Pounds to Newton-Meters - Convert Inch-Pounds to Newton-Meters

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FAQ

How many psi is 1 kPa?

1 kPa ≈ 0.145038 psi, and 1 psi ≈ 6.89476 kPa. Exactly, psi = kPa × 0.64516 ÷ 4.4482216152605. The factor never ends as a decimal, so almost every answer in psi is rounded and shown after ≈; an answer that comes out exact is shown with =.

Where do 0.64516 and 4.4482216152605 come from?

A psi is one pound-force (4.4482216152605 N exactly) on one square inch (0.00064516 m² exactly), and a kilopascal is exactly 1,000 Pa. 0.64516 is 1,000 Pa in a kilopascal times 0.00064516 m², so psi = kPa × 0.64516 ÷ 4.4482216152605.

kPa on the tire placard, psi on the pump: what should I set?

Convert the placard value and set the pump to the answer: 250 kPa is about 36 psi. Both are gauge pressure (counted from the surrounding air), so the factor needs no correction.

How do kPa relate to bar?

1 bar = 100 kPa exactly, so 250 kPa = 2.5 bar. Every answer on this page also shows bar, kgf/cm² and atm.