How to Convert Kilopascals to PSI (kPa to psi)
Pressure conversions are used for tyre pressure (psi or bar), blood pressure readings in mmHg and weather maps in millibars. This guide shows how to convert kilopascals into psi by hand, with examples and a quick-reference table.
The conversion
To convert kilopascals to psi, multiply the value by 0.1450377439. To go the other way, divide by the same number (or multiply by 6.894757). For a quick estimate, multiply by about 0.15.
PSI = kilopascals × 0.1450377439
Worked examples
- 3 kPa = 0.435113 psi
- 12.5 kPa = 1.813 psi
- 75 kPa = 10.8778 psi
Kilopascals to PSI table
| Kilopascals | PSI |
|---|---|
| 1 kPa | 0.145038 psi |
| 2 kPa | 0.290075 psi |
| 5 kPa | 0.725189 psi |
| 10 kPa | 1.4504 psi |
| 20 kPa | 2.9008 psi |
| 25 kPa | 3.6259 psi |
| 50 kPa | 7.2519 psi |
| 100 kPa | 14.5038 psi |
| 250 kPa | 36.2594 psi |
| 500 kPa | 72.5189 psi |
| 1,000 kPa | 145.0377 psi |
Common questions
Is kPa to psi exact?
The factors used here are the internationally defined values where they exist; results are rounded for display only.
How do I convert back?
Use the PSI to Kilopascals converter.
Mistakes to avoid
Multiplying when you should divide
Converting to a smaller unit gives a bigger number, and converting to a larger unit gives a smaller one. If your answer moves the wrong way, you have inverted the factor.
Rounding the factor too early
Using 3 instead of 3.28 for feet per metre introduces an error of almost 9% before you have started.
Dropping the units
A bare number without a unit is easy to misread later. Always write the unit with the result.
Background
Singapore adopted the metric system in the 1970s, replacing imperial units and traditional Chinese measures in most official uses. Metric units are now standard in schools, trade and government, but older units survive in property, markets and imported goods.
Unit conversion is simply multiplication by a fixed ratio. The ratio between two units of the same quantity never changes, so once you know it you can convert any value in either direction.
Many conversion factors are exact by definition. The inch has been defined as exactly 2.54 centimetres since 1959, and the pound as exactly 0.45359237 kilograms, so conversions involving them can be as precise as you need.
For any value, use the Kilopascals to PSI Converter or browse all pressure converters.
Run your own numbers: Kilopascals to PSI Converter