Pounds per square inch to kilopascals
Multiply pounds per square inch by 6.8948 to get kilopascals.
20 psi = 137.8951 kPa
How to convert pounds per square inch to kilopascals
The kilopascal is one thousand pascals (10³ Pa), the metric pressure unit. The pound per square inch is pounds-force per square inch, exactly 6894.757293168 pascals.
Worked example — 20 psi: 20 × 6.8948 = 137.8951 kPa.
Pounds per square inch to kilopascals table
| Pounds per square inch | Kilopascals |
|---|---|
| 1 psi | 6.8948 kPa |
| 5 psi | 34.4738 kPa |
| 10 psi | 68.9476 kPa |
| 15 psi | 103.4214 kPa |
| 20 psi | 137.8951 kPa |
| 30 psi | 206.8427 kPa |
| 32 psi | 220.6322 kPa |
| 50 psi | 344.7379 kPa |
| 100 psi | 689.4757 kPa |
Reverse and related
About pounds per square inch and kilopascals
Pound per square inch (psi)
1 psi = 6.8948 kPaDefinition. Pounds-force per square inch, exactly 6894.757293168 pascals
History and origin
The pound per square inch comes from the imperial system, expressing pressure as pounds-force spread over a square inch. It equals about 6895 pascals.
Current use
Psi is the everyday pressure unit in the United States for tyre pressure, plumbing and compressed air.
Source: NIST SP 811, App. B; ISO 80000-4. Exact SI values are definitional (bar = 10⁵ Pa, atm = 101 325 Pa) or derived from the pound (NIST HB 44) and standard gravity 9.80665 m/s² (psi)
Kilopascal (kPa)
1 kPa = 0.145038 psiDefinition. One thousand pascals (10³ Pa), the metric pressure unit
History and origin
The kilopascal is one thousand pascals, a metric multiple of the SI pressure unit. It gives conveniently sized numbers for everyday pressures.
Current use
Kilopascals are used for tyre pressure in metric countries and throughout engineering.
Source: NIST SP 811, App. B; ISO 80000-4. Exact SI values are definitional (bar = 10⁵ Pa, atm = 101 325 Pa) or derived from the pound (NIST HB 44) and standard gravity 9.80665 m/s² (psi)
Where people use this
Pounds per square inch: tyre pressure in the US, plumbing, compressed air. Kilopascals: tyre pressure (metric), engineering. A 32 psi tyre is about 221 kPa.
Every value is carried to full double precision; the display is rounded.
Both units are defined in NIST SP 811, App. B; ISO 80000-4. Exact SI values are definitional (bar = 10⁵ Pa, atm = 101 325 Pa) or derived from the pound (NIST HB 44) and standard gravity 9.80665 m/s² (psi).
Questions people ask
How many kPa is 32 psi?
A 32 psi tyre is about 221 kPa.
How many kPa in a psi?
One psi is about 6.895 kPa.
How many kPa is 35 psi?
35 psi is about 241 kPa.