This kilopascals to pounds per square inch converter gives you the kPa to psi result instantly, in your browser, with the exact ratio so you can verify it. 1 kilopascal is about 0.145038 pounds per square inch, and going the other way, 1 pound per square inch is 6.89476 kilopascals. Kilopascals are an SI unit used in science and engineering; pounds per square inch are an imperial unit still common in the United States and the United Kingdom.
To convert by hand, multiply the number of kilopascals by 0.145038. For example, 10 kilopascals is 1.45038 pounds per square inch and 100 kilopascals is 14.5038 pounds per square inch. The table below lists the most requested values, and the converter above accepts decimals for anything in between.
kPa to psi formula
psi = kPa × 0.145038
1 kilopascal is about 0.145038 pounds per square inch. Multiply the value in kilopascals by that factor to get pounds per square inch.
Kilopascals to Pounds per square inch conversion table
| kilopascals | pounds per square inch | Rounded |
|---|---|---|
| 1 kPa | 0.145038 psi | 0.145 |
| 2 kPa | 0.290075 psi | 0.29 |
| 3 kPa | 0.435113 psi | 0.435 |
| 4 kPa | 0.580151 psi | 0.58 |
| 5 kPa | 0.725189 psi | 0.725 |
| 6 kPa | 0.870226 psi | 0.87 |
| 7 kPa | 1.01526 psi | 1.02 |
| 8 kPa | 1.1603 psi | 1.16 |
| 9 kPa | 1.30534 psi | 1.31 |
| 10 kPa | 1.45038 psi | 1.45 |
| 12 kPa | 1.74045 psi | 1.74 |
| 15 kPa | 2.17557 psi | 2.18 |
| 20 kPa | 2.90075 psi | 2.9 |
| 25 kPa | 3.62594 psi | 3.63 |
| 30 kPa | 4.35113 psi | 4.35 |
| 40 kPa | 5.80151 psi | 5.8 |
| 50 kPa | 7.25189 psi | 7.25 |
| 60 kPa | 8.70226 psi | 8.7 |
| 70 kPa | 10.1526 psi | 10.2 |
| 75 kPa | 10.8778 psi | 10.9 |
| 80 kPa | 11.603 psi | 11.6 |
| 90 kPa | 13.0534 psi | 13.1 |
| 100 kPa | 14.5038 psi | 14.5 |
| 150 kPa | 21.7557 psi | 21.8 |
| 200 kPa | 29.0075 psi | 29 |
| 250 kPa | 36.2594 psi | 36.3 |
| 300 kPa | 43.5113 psi | 43.5 |
| 500 kPa | 72.5189 psi | 72.5 |
| 750 kPa | 108.778 psi | 109 |
| 1,000 kPa | 145.038 psi | 145 |
Frequently asked questions
How many pounds per square inch are in 5 kilopascals?
5 kPa = 0.725189 psi. Multiply 5 by 0.145038, the number of pounds per square inch in one kilopascal. The converter on this page does the same arithmetic for any value, including decimals.
What is the formula to convert kilopascals to pounds per square inch?
psi = kPa × 0.145038. The factor comes from the definitions of the units: 1 kilopascal is about 0.145038 pounds per square inch. Worked example: 12 kPa = 1.74045 psi.
Is 30 kPa the same as 4.35113 psi?
Yes. 30 kPa = 4.35113 psi. Rounded to four decimals it is 4.351 psi.
How do I convert pounds per square inch back to kilopascals?
Divide by 0.145038, or multiply by 6.89476: 1 pound per square inch is 6.89476 kilopascals. The pounds per square inch to kilopascals page linked above lists common values the other way.
Is the kPa to psi conversion exact?
1 kilopascal is about 0.145038 pounds per square inch. The ratio is a defined constant but produces a long decimal, so this page rounds to six significant digits, which is more precision than any everyday measurement needs.