kPa to PSI Conversion Calculator
This calculator converts pressure values between kilopascals (kPa) and pounds per square inch (PSI), the two units most commonly seen on New Zealand tyre placards, pressure washers, gauges and imported equipment. Enter a pressure in kilopascals and it instantly returns the equivalent in PSI, or enter a PSI value instead and it works backwards to the kPa figure, using the exact factor of 1 kPa = 0.14503773773 PSI. Results are also shown in pascals and bar, so you can see the same pressure expressed across the units used in engineering, weather and industrial settings. A dropdown of common pressure presets lets you jump straight to typical figures such as standard atmospheric pressure, everyday car and 4WD tyre pressures, bicycle tyres and pressure washer settings, without needing to know the numbers off by heart. You can also choose how many decimal places the result is rounded to, from two through to six, depending on whether you need a quick round figure or a precise reading for calibration work. A worked example, a breakdown of the calculation and a reference table of common pressures across kPa, PSI and bar sit below the form. Because the conversion factor is fixed and internationally defined, results are mathematically exact, though for critical engineering, medical or safety applications you should always confirm the figure against your instrument's calibration certificate or the applicable standard.
1. Convert kPa to PSI
2. Or Convert PSI to kPa
kPa to PSI Breakdown
Worked Example
Common Pressure Reference Values
| Pressure | kPa | PSI | Bar |
|---|---|---|---|
| Vacuum (absolute zero) | 0 | 0 | 0 |
| Standard atmosphere | 101.325 | 14.696 | 1.013 |
| Car tyre typical (NZ door placard) | 220 to 260 | 31.9 to 37.7 | 2.20 to 2.60 |
| 4WD tyre loaded | 300 to 350 | 43.5 to 50.8 | 3.00 to 3.50 |
| Road bicycle tyre | 620 to 790 | 90 to 115 | 6.20 to 7.90 |
| Mountain bike tyre | 170 to 410 | 25 to 60 | 1.70 to 4.10 |
| Scuba tank (full) | 20,000 | 2,901 | 200 |
| Fire hose operating pressure | 700 to 1,400 | 102 to 203 | 7.0 to 14.0 |