31 pounds per square inch to bar
2.137 bar
31 psi = 2.137 bar.
bar
2.137bar
31 psi = 2.137 bar
In short
How many bar is 31 pounds per square inch?
31 psi = 2.137 bar. 1 pounds per square inch = 0.068948 bar, so the working is 31 × 0.068948 = 2.137.
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 31 × 0.068948 = 2.137
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 | 2 | −0.13737 |
| 1 decimal | 2.1 | −0.03737 |
| 2 decimals | 2.14 | +0.00263 |
Round trip: take 2.137 bar back the other way and you land on 30.9946 psi — a drift of 0.0054 psi. That gap is the rounding, not the conversion.
What 31 psi looks like
32 psi
A frequently quoted cold pressure for a passenger car tyre, and the figure to check against your own door placard rather than assume.
Frequently asked questions
What is 31 pounds per square inch in bar?
31 pounds per square inch is 2.137 bar. 1 pounds per square inch = 0.068948 bar, so the working is 31 × 0.068948 = 2.137.
How accurate is 2.137 bar?
Rounding to 2.137 bar and converting straight back gives 30.9946 psi, a drift of 0.0054 psi from the 31 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.
Open the PSI to bar converter →