PSI to kPa Converter | UnitConversion

Unit Relationship

PSI and kilopascals are both units of pressure. One PSI equals approximately 6.89476 kPa.

Worked Example

For example, 35 PSI × 6.89476 = 241.3166 kPa, which is about 241 kPa for a practical pressure reading.

Unit Definitions

PSI: PSI means pounds-force per square inch (lbf/in²), commonly called pounds per square inch.

kPa: A kilopascal (kPa) is 1,000 pascals, an SI-derived unit of pressure.

Practical Uses

checking tire-pressure values shown in PSI or kPa
comparing compressor and pneumatic pressure specifications
reviewing hydraulic pressure ratings
working with construction and mechanical pressure specifications

Precision and Rounding

This converter uses 1 PSI = 6.89476 kPa. For everyday readings, rounding to the nearest whole kPa is often sufficient, while engineering or specification work may require additional decimal places.

Important Notes

A unit conversion does not determine the correct operating pressure for a tire or system; use the manufacturer or equipment specification.
PSI and kPa can both describe gauge pressure or absolute pressure. Converting the unit does not change the pressure reference.
Avoid rounding intermediate values too early when the converted pressure will be used in further calculations.

Frequently Asked Questions

PSI	kPa
1	6.89
10	68.95
50	344.74
100	689.48

Why are both PSI and kPa used for pressure?

PSI is common in U.S. customary applications, while kPa is an SI-derived pressure unit used widely in metric specifications and equipment.

Is 1 PSI exactly 6.9 kPa?

No. 6.9 kPa is a useful rounded approximation. This converter uses 1 PSI = 6.89476 kPa.

Does converting PSI to kPa change gauge pressure to absolute pressure?

No. The conversion changes only the pressure unit. A gauge-pressure value remains gauge pressure, and an absolute-pressure value remains absolute pressure.

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