Convert kilopascals to bar
1 kPa = 0.01 bar
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How many bar are in a kilopascal?
One kilopascal is 0.01 bar. To convert any amount, multiply by 0.01. Going the other way, one bar is 100 kilopascals.
What is the formula to convert kPa to bar?
Multiply the kilopascal figure by 0.01. So bar = kPa × 0.01. For a quick mental estimate, dividing by about 100 gets you close enough for most everyday purposes.
What does a kilopascal actually look like?
One kilopascal is a car tyre runs about 220 kPa. The kilopascal is the SI-derived unit used on tyre placards in Canada, Australia and much of Europe, and in weather reporting.
And what is a bar?
One bar is roughly atmospheric pressure at sea level. One bar is exactly 100,000 pascals, chosen to be close to average atmospheric pressure at sea level. It is the common unit for tyre and diving pressures in Europe.
Is this conversion exact?
Yes. Since the 1959 international yard and pound agreement, the imperial and metric systems are related by exact definitions rather than measurements — the inch is exactly 25.4 mm and the pound exactly 0.45359237 kg. Everything derived from those, including this conversion, is therefore exact. Round at the end rather than partway through, since rounding kPa before converting introduces an error the conversion then multiplies.
About kpa to bar
How to convert kilopascals to bar
Multiply by 0.01. One kilopascal is 0.01 bar, and one bar is 100 kilopascals.
bar = kPa × 0.01
Worked example
10 kPa = 0.1 bar. For a sense of scale, one kilopascal is a car tyre runs about 220 kPa, and one bar is roughly atmospheric pressure at sea level.
About the kilopascal
The kilopascal is the SI-derived unit used on tyre placards in Canada, Australia and much of Europe, and in weather reporting.
About the bar
One bar is exactly 100,000 pascals, chosen to be close to average atmospheric pressure at sea level. It is the common unit for tyre and diving pressures in Europe.
Quick reference
| kilopascals | bar |
|---|---|
| 1 kPa | 0.01 bar |
| 2 kPa | 0.02 bar |
| 5 kPa | 0.05 bar |
| 10 kPa | 0.1 bar |
| 25 kPa | 0.25 bar |
| 50 kPa | 0.5 bar |
| 100 kPa | 1 bar |
| 1000 kPa | 10 bar |
Getting it right
This conversion is exact by definition, so the only limit on accuracy is how many digits you keep. Round at the end rather than partway through — rounding kPa to a whole number before converting introduces an error that the conversion then multiplies.
Other pressure conversions
Convert bar back to kilopascals, or pick any other pair with the full unit converter. Related: kPa to psi, kPa to atm.