Unit converter
Bar to Pounds Per Square Inch Converter
Turn a pressure in bar into pounds per square inch. The bar is a metric pressure unit fixed at exactly 100000 pascals, while one psi works out at 6894.757293168361 pascals, which makes one bar equal to about 14.503773773 psi. Enter any reading in bar and the tool returns the psi value, alongside a table of the figures people search for most. The most common reason to convert is car and bike tyre pressure, where European labels quote bar and American gauges read psi, but the same swap helps with scuba cylinders, bicycle tyres pumped hard, hydraulic rigs, and barometric weather readings.
1 bar = 14.5038 pounds per square inch
Common bar to pounds per square inch values
| Bar | Pounds per square inch |
|---|---|
| 1 bar | 14.5038 psi |
| 2 bar | 29.0075 psi |
| 5 bar | 72.5189 psi |
| 10 bar | 145.04 psi |
| 20 bar | 290.08 psi |
| 50 bar | 725.19 psi |
| 100 bar | 1,450.38 psi |
How to convert
- Start with the pressure written in bar.
- Multiply that figure by 14.503773773, the number of psi in one bar.
- The product is the identical pressure stated in psi.
- Going back the other way, divide a psi reading by 14.503773773 to land on bar.
- For a quick head count, multiply the bar value by about 14.5: 2 bar sits near 29 psi.
psi = bar × 14.503773773
A bar holds 100000 pascals and a psi holds 6894.757293168361 pascals, so dividing the first by the second yields the ratio 14.503773773. Multiply a bar reading by that ratio to reach psi, and divide a psi reading by it to return to bar. The pascal underpins both, so the conversion is one fixed multiplication.
- bar
- the pressure in bar you begin with
- 14.503773773
- psi in one bar (100000 Pa divided by 6894.757293168361 Pa)
Worked example
A front tyre inflated to 2.3 bar comes to 2.3 times 14.503773773, which is roughly 33.36 psi. A racing bicycle tyre at 6 bar reaches about 87.02 psi, the sort of pressure a track rider might run.
Key facts
- One bar is about 14.503773773 psi; one psi is roughly 0.0689 bar.
- A car tyre at 2.2 bar reads close to 31.91 psi on an imperial gauge.
- A full scuba cylinder at 200 bar is near 2900.75 psi.
- Sea-level air pressure of about 1.013 bar equals roughly 14.7 psi.
Tips
- When a tyre placard shows bar but your pump reads psi, multiply by about 14.5 to set the target.
- For mountain bike tyres quoted in bar, the psi figure helps when borrowing a track pump marked in imperial units.
- Carry the full decimals through the sum and round only the final psi figure so the answer stays tight.
Frequently asked questions
How many psi in 1 bar?+
One bar equals about 14.503773773 psi. It follows directly from a bar being 100000 pascals and a psi being 6894.757293168361 pascals.
Are bar and psi measuring the same thing?+
Yes, both express force spread over an area. Bar is the metric label and psi the imperial one, so a value in either can be rewritten in the other with no loss.
What is 2 bar in psi?+
Two bar is around 29.01 psi, a typical car tyre pressure on many family vehicles.
Is one bar the same as one atmosphere?+
Almost, but not quite. A standard atmosphere is 101325 pascals while one bar is 100000 pascals, so a bar is about 0.987 atmospheres.
Things to watch
- Most tyre and cylinder gauges show gauge pressure, the amount above the surrounding air, not absolute pressure. Mixing the two adds roughly one bar of error.
Sources
Last updated: 2026-01-01
Conversions use internationally defined factors. Provided for general use; verify critical measurements independently.