kPa to PSI
Convert kilopascal to pound/inch² instantly — type a value and read the result, with the exact formula shown.
Reviewed by the CalcCafe editorial team · Last updated 1 July 2026 · How we test our tools
Example
1 kPa = 0.1450377 psi, 5 kPa = 0.7251887 psi, 10 kPa = 1.450377 psi.
Common conversions: kilopascal to pound/inch²
Quick reference for the kPa → psi values you are most likely to need, computed with the exact factor the converter above uses. It includes the specific values people most often look up (230 kPa, 250 kPa, 220 kPa, 240 kPa, 200 kPa). See also the reverse converter: Pound/inch² to Kilopascal.
| Kilopascal (kPa) | Pound/inch² (psi) |
|---|
| 1 kPa | 0.145038 psi |
| 2 kPa | 0.290075 psi |
| 3 kPa | 0.435113 psi |
| 5 kPa | 0.725189 psi |
| 10 kPa | 1.4504 psi |
| 15 kPa | 2.1756 psi |
| 20 kPa | 2.9008 psi |
| 25 kPa | 3.6259 psi |
| 30 kPa | 4.3511 psi |
| 40 kPa | 5.8015 psi |
| 50 kPa | 7.2519 psi |
| 60 kPa | 8.7023 psi |
| 70 kPa | 10.1526 psi |
| 75 kPa | 10.8778 psi |
| 80 kPa | 11.603 psi |
| 90 kPa | 13.0534 psi |
| 100 kPa | 14.5038 psi |
| 150 kPa | 21.7557 psi |
| 200 kPa | 29.0075 psi |
| 220 kPa | 31.9083 psi |
| 225 kPa | 32.6335 psi |
| 230 kPa | 33.3587 psi |
| 240 kPa | 34.8091 psi |
| 250 kPa | 36.2594 psi |
| 300 kPa | 43.5113 psi |
| 500 kPa | 72.5189 psi |
| 1,000 kPa | 145.0377 psi |
Pound/inch² to Kilopascal
| Pound/inch² (psi) | Kilopascal (kPa) |
|---|
| 1 psi | 6.8948 kPa |
| 5 psi | 34.4738 kPa |
| 10 psi | 68.9476 kPa |
| 50 psi | 344.7379 kPa |
| 100 psi | 689.4757 kPa |
How it works
Pound/inch² = Kilopascal × 0.1450377. Every value is converted through a single pascal base unit using internationally defined conversion factors, so any from/to pair stays consistent.
Good to know
Converting kilopascals to PSI is something you reach for the moment metric and imperial worlds collide — usually around tire pressure, HVAC and refrigerant gauges, bicycle pumps, espresso machines, or industrial spec sheets. A European car door sticker might list 230 kPa, while the dial on your American gas-station air pump only speaks PSI. This conversion bridges that gap so you inflate to the right number instead of guessing.
The kilopascal is the SI metric unit: a pascal is one newton spread over one square metre, and "kilo" simply scales it up a thousandfold. PSI is the imperial workhorse — pounds of force pressed onto a single square inch — and remains the default in the United States for tires, plumbing, and compressed air. Both measure the same physical thing; they just count it in different building blocks.
A handy rule of thumb: roughly every 7 kPa equals about 1 PSI, so to estimate PSI in your head you can divide the kPa figure by 7. Want it tighter? Take the kPa value, knock off a digit (divide by 10) and add about 45% — for example, 200 kPa is near 20 plus 9, giving about 29 PSI (the exact answer is 29.0 PSI).
The most common mistake is confusing gauge pressure with absolute pressure. Tire and HVAC readings are normally gauge pressure (pressure above the surrounding atmosphere), and the kPa-to-PSI factor applies cleanly to both — but if one figure is "absolute" (kPaa/psia) and the other is "gauge" (kPag/psig), they differ by roughly 101.3 kPa (14.7 PSI), and forgetting that offset throws everything off.
Frequently asked questions
How do you convert kilopascal to pound/inch²?
Multiply the number of kilopascals by 0.1450377 to get pound/inch²s. For example, 1 kPa = 0.1450377 psi.
What is 1 kilopascal in pound/inch²s?
1 kilopascal equals 0.1450377 pound/inch²s (1 kPa = 0.1450377 psi).
How many kilopascals are in 1 pound/inch²?
There are 6.894757 kilopascals in 1 pound/inch².
Is this converter free and private?
Yes. It runs entirely in your browser, so your inputs never leave your device, there is no sign-up, and it works offline once loaded.
Are the conversions exact?
Conversions use internationally defined factors and are exact where the definitions are exact (for example, 1 inch = 2.54 cm). Displayed results are rounded for readability.
People also ask
What is 230 kPa in PSI?
230 kPa equals about 33.4 PSI (230 × 0.1450377 = 33.36 PSI). This is a typical front-tire pressure listed on European cars.
What car tire pressure in kPa equals 32 PSI?
32 PSI is about 220.6 kPa (32 × 6.894757). Many vehicles round this to 220 kPa on the door-jamb sticker.
Is 250 kPa a good tire pressure?
250 kPa is about 36.3 PSI, which is a common cold-inflation pressure for many passenger cars and small SUVs. Always check your vehicle's recommended figure rather than assuming a single value fits all cars.
How do I quickly estimate PSI from kPa in my head?
Divide the kPa value by 7 for a fast estimate, since 1 PSI is about 6.9 kPa. For example, 210 kPa ÷ 7 is about 30 PSI (the exact figure is 30.5 PSI).
What is 100 kPa in PSI?
100 kPa equals 14.5 PSI (100 × 0.1450377). That is close to standard atmospheric pressure, which is about 101.3 kPa or 14.7 PSI.
Are kPa and PSI the same as bar?
No, but they are related: 1 bar equals 100 kPa and about 14.5 PSI. So a bar reading is essentially the kPa value divided by 100.
Is kPa bigger than PSI?
No, a PSI is the larger unit — 1 PSI equals 6.894757 kPa. That means any pressure has a smaller number when expressed in PSI than in kPa.
Is 40 PSI too high for tires?
It depends on what your vehicle specifies, not on the number itself. 40 psi is 275.8 kPa (40 ÷ 0.1450377), and while many passenger cars call for pressures in the low-to-mid 30s psi, some cars, vans, and load-rated tires are designed for 40 psi or more, so check the placard on the driver's door jamb rather than the maximum printed on the tire sidewall. Running well above the placard figure reduces grip and wears the center of the tread, while running below it hurts fuel economy and handling.
Related calculators
Sources & references
These tools follow our methodology and provide educational estimates only — verify important figures with a qualified professional.