Convert PSI to Kilopascals
PSI to kilopascals is the conversion you need when a pressure reading is in the everyday US unit — pounds per square inch, the number on a tire gauge or an air compressor — but the spec is in metric kPa. One psi is approximately 6.894757293168361 kPa, so the kilopascal figure comes out about seven times larger.
Pounds per square inch to Kilopascals conversion table
| Pounds per square inch (psi) | Kilopascals (kPa) |
|---|---|
| 1 | 6.894757 |
| 2 | 13.789515 |
| 3 | 20.684272 |
| 5 | 34.473786 |
| 10 | 68.947573 |
| 20 | 137.895146 |
| 50 | 344.737865 |
| 100 | 689.475729 |
| 500 | 3,447.378647 |
| 1,000 | 6,894.757293 |
The formula
To convert psi to kilopascals, multiply the pressure in psi by 6.894757293168361:
kilopascals = psi × 6.894757293168361
A worked example
Say you have a car tire at 32 psi and want it in kilopascals:
32 × 6.894757293168361 = 220.63223 kPa
So a tire at 32 psi is about 220.6 kilopascals.
Why it's an approximation
Psi (pounds per square inch) is a US imperial unit, built from the pound and the inch. The kilopascal is metric — a thousand pascals, built from the newton and the meter. The two systems don't divide evenly, so converting between them lands on a long, non-terminating number — 6.894757293168361 is that value rounded off. It's carried to enough decimals for any everyday job, but it stays an approximation rather than a clean, exact figure.
When you'll use it
Reading a US tire or compressor gauge in psi and needing the metric kilopascal for a car spec, an engineering datasheet, or a door-jamb sticker written in kPa.
Frequently asked questions
How many kilopascals are in one psi?
About 6.894757293168361 kilopascals. It's a rounded figure — psi is an imperial unit that doesn't line up evenly with the kilopascal, so this factor is carried to enough decimals to be practical but is not exact.
What is a typical car tire in kilopascals?
A car tire at about 32 psi is roughly 220.63223 kPa. Kilopascals are the metric pressure unit you'll see on many car door-jamb stickers outside the US, which is why the kPa figure is handy to have.
Is the psi to kilopascals conversion exact?
No. Psi is a US imperial unit, and its conversion to the metric kilopascal is a long, non-terminating number. The factor 6.894757293168361 is rounded — more decimal places give more precision if you need it.