PSI to kPa
Convert PSI to kPa
"PSI to kPa" Calculator
How to convert pounds per square inch to kilopascals
Worked example: 35 psi ≈ 241.32 kPa
35 psi × 4.4482216152605 ÷ 0.64516 ≈ 241.32 kPa
0.64516 = 1,000 Pa in a kilopascal × 0.00064516 m² in a square inch; 4.4482216152605 N in a pound-force
Rule: kilopascals = pounds per square inch × 4.4482216152605 ÷ 0.64516 ≈ pounds per square inch × 6.89476 — 1 psi = 1 lbf/in².
| Pounds per square inch | Kilopascals |
|---|---|
| 1 psi | 6.89 kPa |
| 2.5 psi | 17.24 kPa |
| 3.5 psi | 24.13 kPa |
| 4 psi | 27.58 kPa |
| 5 psi | 34.47 kPa |
| 10 psi | 68.95 kPa |
| 14.7 psi | 101.35 kPa |
| 15 psi | 103.42 kPa |
| 20 psi | 137.9 kPa |
| 30 psi | 206.84 kPa |
| 32 psi | 220.63 kPa |
| 33 psi | 227.53 kPa |
| 35 psi | 241.32 kPa |
| 36 psi | 248.21 kPa |
| 40 psi | 275.79 kPa |
| 50 psi | 344.74 kPa |
| 60 psi | 413.69 kPa |
| 90 psi | 620.53 kPa |
| 100 psi | 689.48 kPa |
| 145 psi | 999.74 kPa |
See Also
- Bar to PSI - Convert Bar to PSI
- PSI to Bar - Convert PSI to Bar
- kPa to PSI - Convert kPa to PSI
- MPa to kgf/cm² - Convert MPa to kgf/cm²
- MPa to PSI - Convert MPa to PSI
- Bar to atm - Convert Bar to atm
- atm to Bar - Convert atm to Bar
- 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 kPa is 1 psi?
1 psi ≈ 6.89476 kPa, and 1 kPa ≈ 0.145038 psi. Exactly, kPa = psi × 4.4482216152605 ÷ 0.64516. The factor never ends as a decimal, so almost every answer in kPa is rounded and shown after ≈; an answer that comes out exact is shown with =.
Where do 4.4482216152605 and 0.64516 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 kPa = psi × 4.4482216152605 ÷ 0.64516.
psi on the tire placard, kPa on the gauge: what should I set?
Convert the placard value and set the gauge to the answer: 35 psi is about 241 kPa. Both are gauge pressure (counted from the surrounding air), so the factor needs no correction.
Gauge or absolute pressure: does it matter?
No, as long as both sides are of the same kind. Gauge pressure (psig) counts from the surrounding air, absolute pressure (psia) from vacuum, and the factor is the same for both. Tire and compressor gauges show gauge pressure.