Psi to Kilopascals
An instant psi-to-kilopascals converter, with the formula and a reference table below.
| Psi | Kilopascals |
|---|---|
| 1 psi | 6.894757 kPa |
| 2 psi | 13.789515 kPa |
| 3 psi | 20.684272 kPa |
| 5 psi | 34.473786 kPa |
| 10 psi | 68.947573 kPa |
| 25 psi | 172.368932 kPa |
| 50 psi | 344.737865 kPa |
| 100 psi | 689.475729 kPa |
How to use
- Enter a value in the Psi field.
- The Kilopascals figure appears immediately — no button to press.
- Typing in the Kilopascals field converts back to Psi the same way.
- Use the reference table for the values that come up most often.
Psi to Kilopascals formula
The factor from psi to kilopascals is 6.89475729.
kPa = psi × 6.89475729
Why this factor: the pound per square inch and the kilopascal are both defined against the pascal, so dividing one definition by the other gives 6.89475729 directly. Both definitions are set out in full below.
To go the other way, divide by 6.89475729 — or use the Kilopascals to Psi converter, which is the same calculation reversed.
Worked example
Given 100 psi, multiplying by 6.89475729 yields 689.475729 kPa.
100 psi × 6.89475729 = 689.475729 kPa
The converter above does this for any value you type, in either direction.
What is a pound per square inch?
Pounds per square inch is the standard pressure unit in the United States.
Definition: One pound-force per square inch, which is about 6,894.757 pascals.
Where it is used: US tire pressure, compressed air and hydraulic systems, and plumbing water pressure.
What is a kilopascal?
A kilopascal is 1,000 pascals, the practical metric pressure unit.
Definition: Exactly 1,000 pascals. Standard atmospheric pressure is 101.325 kPa.
Where it is used: Tyre pressures outside the US, weather reports in Canada, and structural engineering loads.
Psi vs Kilopascals
The pound per square inch is a US customary unit while the kilopascal is a metric unit. That is why the factor between them is not a round number: the two systems were defined independently and only later tied together by exact agreement.
Frequently asked questions
How many kilopascals are in a pound per square inch?
One pound per square inch equals 6.89475729 kilopascals.
What is the formula to convert psi to kilopascals?
Multiply the number of psi by 6.89475729. To reverse it, divide by 6.89475729 instead.
How do I convert kilopascals back to psi?
Divide by 6.89475729, which is the same as multiplying by 0.145037738.
How many kilopascals are in 10 psi?
10 psi works out to 68.947573 kPa.
How is the pound per square inch defined?
One pound-force per square inch, which is about 6,894.757 pascals.