Convert kPa to PSI Instantly
Use this kPa to PSI converter to change pressure from kilopascals (kPa) into pounds per square inch (psi) with fast, accurate results. Enter any decimal pressure value, use the reverse PSI to kPa tool, or compare kPa with bar, MPa, pascals and atmospheres.
Convert kPa to PSI, reverse PSI to kPa, convert other common pressure units to PSI, or compare one value across multiple pressure units.
Enter pressure in kilopascals to calculate the equivalent value in PSI and other common units.
Decimals are supported, such as 101.325 or 250.5 kPa.
Reverse the conversion from pounds per square inch to kilopascals.
Convert bar, megapascals or standard atmospheres directly into pounds per square inch.
Enter one pressure value and convert it into kPa, PSI, pascals, MPa, bar and standard atmospheres.
Kilopascals and pounds per square inch are both units used to express pressure. Kilopascals are derived from the SI pascal, while PSI is widely used in U.S. customary applications such as tire pressure, compressed air, pumps, hydraulics and mechanical equipment.
To convert kPa to PSI, multiply the pressure in kilopascals by approximately 0.1450377377. The result tells you the same pressure expressed in pounds-force per square inch.
Example: 250 kPa × 0.1450377377 ≈ 36.2594 PSI.
Example: 35 PSI × 6.894757293 ≈ 241.3165 kPa.
The pascal (Pa) is the SI derived unit of pressure. One kilopascal is 1,000 pascals. PSI means pounds per square inch and expresses pressure as pound-force acting over one square inch. NIST publishes pressure conversion factors for common SI and non-SI pressure units.
Use this kPa to PSI chart for quick reference. Calculator results above are better when you need a value that is not listed or when you want more decimal places.
| kPa | PSI | Bar | MPa |
|---|---|---|---|
| 1 kPa | 0.1450 psi | 0.01 bar | 0.001 MPa |
| 5 kPa | 0.7252 psi | 0.05 bar | 0.005 MPa |
| 10 kPa | 1.4504 psi | 0.10 bar | 0.010 MPa |
| 20 kPa | 2.9008 psi | 0.20 bar | 0.020 MPa |
| 25 kPa | 3.6259 psi | 0.25 bar | 0.025 MPa |
| 50 kPa | 7.2519 psi | 0.50 bar | 0.050 MPa |
| 75 kPa | 10.8778 psi | 0.75 bar | 0.075 MPa |
| 100 kPa | 14.5038 psi | 1 bar | 0.100 MPa |
| 101.325 kPa | 14.6959 psi | 1.01325 bar | 0.101325 MPa |
| 150 kPa | 21.7557 psi | 1.5 bar | 0.150 MPa |
| 200 kPa | 29.0075 psi | 2 bar | 0.200 MPa |
| 250 kPa | 36.2594 psi | 2.5 bar | 0.250 MPa |
| 300 kPa | 43.5113 psi | 3 bar | 0.300 MPa |
| 500 kPa | 72.5189 psi | 5 bar | 0.500 MPa |
| 1,000 kPa | 145.0377 psi | 10 bar | 1 MPa |
35 × 0.1450377377 = 5.0763 psi.
80 × 0.1450377377 = 11.6030 psi.
220 × 0.1450377377 = 31.9083 psi.
350 × 0.1450377377 = 50.7632 psi.
The same multiplication works for decimals. For example, 123.4 kPa converts to about 17.8977 psi. Keep extra digits during intermediate calculations and round only the final result to the precision your application requires.
A kilopascal is a pressure unit equal to 1,000 pascals. The symbol is kPa. Because the pascal is an SI derived unit, kPa is common in engineering, weather data, material specifications, compressed air systems and many metric-based pressure measurements.
A pressure of 100 kPa equals 100,000 pascals and exactly 1 bar. Standard atmospheric pressure is commonly expressed as 101.325 kPa, which is about 14.6959 psi.
PSI stands for pounds per square inch, more precisely pound-force per square inch. It is frequently used in the United States for vehicle tires, air compressors, hydraulic systems, gas systems and industrial pressure gauges.
One PSI equals approximately 6.894757 kPa. This is why converting a kPa reading into PSI produces a smaller numerical value. For example, 200 kPa is about 29.0075 PSI.
The same physical pressure can be written with different numerical values depending on the unit.
Converting kPa to PSI is useful whenever a pressure specification is given in metric units but a gauge, manual or product label uses PSI. Vehicle tire placards in many countries list kPa, while some handheld gauges display PSI. Compressed-air systems, pumps, pressure washers, HVAC equipment and industrial machinery can also mix these units.
The conversion is equally useful when comparing international technical specifications. A manufacturer may publish a pressure rating in kPa or MPa, while a U.S. supplier lists an equivalent value in PSI. Converting the units provides a direct comparison without changing the actual pressure.
A unit conversion does not change the pressure reference. If your original value is gauge pressure, the converted value is still gauge pressure. If the original value is absolute pressure, the converted value remains absolute pressure. The calculator changes only the unit, not the reference point used by the measurement.
For everyday tire-pressure checks, one decimal place in PSI may be more precision than needed. For engineering calculations, calibration work or technical specifications, keep more decimal places and follow the tolerance required by the equipment or standard.
Avoid using a rough mental shortcut when accuracy matters. Multiplying kPa by 0.145 gives a close estimate, but the calculator uses a more precise conversion factor so that decimal values remain consistent.
That factor is for PSI to kPa. For kPa to PSI, multiply by about 0.14504.
1 kPa equals 1,000 Pa, so entering pascals as kilopascals creates a 1,000× error.
Unit conversion alone does not account for atmospheric pressure.
Keep enough digits until the final result, especially for technical work.
For more pressure conversions, use our Bar to PSI, kPa to Bar, kPa to MPa and Bar to kPa tools. For authoritative measurement references, see the NIST Pressure and Gas Flow Unit Conversions and the BIPM International System of Units.
Quick answers about kilopascals, PSI and pressure conversion.