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.
| 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
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.