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Free Kilopascals to PSI Converter

Convert kilopascals (kPa) to pounds per square inch (psi). Many cars show tyre pressure in kPa, while gauges and US specs use psi.

1 kPa = 0.145 psi

Pick any units and edit either box — it converts instantly in your browser.

Quick answer

To convert kPa to psi, multiply by 0.145038, because 1 psi equals 6.89476 kPa. For example, 220 kPa is about 31.9 psi.

Formula & method

psi = kilopascals × 0.1450377377
  • kPa — value in kilopascals
  • psi — result in psi
  • 0.1450377377 — exact conversion factor (1 kPa = 0.1450377377 psi)

To convert back, divide by 0.1450377377 (1 psi = 6.894757 kPa).

Kilopascals to PSI — common values

Kilopascals (kPa)PSI (psi)
10 kPa1.4504 psi
50 kPa7.2519 psi
100 kPa14.5038 psi
101.325 kPa14.6959 psi
200 kPa29.0075 psi
250 kPa36.2594 psi
300 kPa43.5113 psi
500 kPa72.5189 psi

Examples

Example 1: Atmospheric pressure
Input
101.325 kPa
Result
14.6959 psi
Why
Standard sea-level pressure ≈ 14.7 psi.
Example 2: Car tyre (kPa)
Input
220 kPa
Result
31.9083 psi
Why
220 kPa ≈ 32 psi, a typical tyre figure.
Example 3: Round number
Input
100 kPa
Result
14.5038 psi
Why
100 kPa ≈ 14.5 psi (≈ 1 bar).
Example 4: Higher pressure
Input
300 kPa
Result
43.5113 psi
Why
300 kPa ≈ 43.5 psi.

Common mistakes

  • Rounding too early. Multiply by the full factor (0.1450377377) first, then round only the final psi value.
  • Converting the wrong way. This page goes Kilopascals → PSI; to go back, divide by 0.1450377377.

Frequently asked questions

What is the kPa to psi factor?

1 kPa = 0.1450377 psi, and 1 psi = 6.894757 kPa.

My car says 220 kPa — what is that in psi?

About 32 psi, a common cold tyre pressure.

How does kPa relate to bar?

100 kPa = 1 bar, so kPa is just a finer scale of the same metric pressure unit.

What is standard atmospheric pressure in kPa?

101.325 kPa at sea level, which is about 14.7 psi.

Why do tyres use kPa?

kPa is the SI-derived metric unit, so many non-US vehicles and manuals print tyre pressure in kPa.

Sources & references

External references open in a new tab. We are independent and not affiliated with these organizations.

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Last updated: How we calculateReport a correctionDisclaimer

Provided “as is” for general information only — results may be inaccurate, so verify before you rely on them. No warranty; use at your own risk.

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