21 pounds per square inch to bar
1.448 bar
21 psi = 1.448 bar.
bar
1.448bar
21 psi = 1.448 bar
In short
How many bar is 21 pounds per square inch?
21 psi = 1.448 bar. 1 pounds per square inch = 0.068948 bar, so the working is 21 × 0.068948 = 1.448.
The working
The factor below is an exact definition rather than a measurement, so nothing is approximated in the arithmetic. The only rounding on this page happens where a number is displayed.
1 pounds per square inch = 0.068948 bar 21 × 0.068948 = 1.448
How much precision do you need?
Each row is the same answer cut at a different number of decimals, with what that choice costs you. Pick the shortest row whose error is smaller than whatever you are measuring with.
| Rounded to | Answer (bar) | Off by |
|---|---|---|
| Whole number | 1 | −0.44790 |
| 1 decimal | 1.4 | −0.04790 |
| 2 decimals | 1.45 | +0.00210 |
Round trip: take 1.448 bar back the other way and you land on 21.0015 psi — a drift of 0.0015 psi. That gap is the rounding, not the conversion.
Frequently asked questions
What is 21 pounds per square inch in bar?
21 pounds per square inch is 1.448 bar. 1 pounds per square inch = 0.068948 bar, so the working is 21 × 0.068948 = 1.448.
How accurate is 1.448 bar?
Rounding to 1.448 bar and converting straight back gives 21.0015 psi, a drift of 0.0015 psi from the 21 you started with. The factor itself is exact; every bit of that difference comes from the rounding, not the conversion.
Nearby values
Any value at all
PSI to Bar Converter
Convert psi to bar — US tyre placards read against a European gauge.
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