PSI to Bar Converter
Convert pounds per square inch to bar — divide by 14.5. Results update as you type; exact factors shown.
One pound per square inch is 0.0689 bars — see the exact factor, not a rounded rule of thumb.
How the psi to bar converter works
Pressures convert through the pascal (1 N/m²). One bar is exactly 100 kPa; a standard atmosphere is exactly 101.325 kPa; 1 psi is 6.894757 kPa (a pound-force on a square inch); 1 mmHg is 133.322 Pa by the conventional definition.
The UK is metric for most trade and science but keeps miles, pints, stone and mpg (with the imperial gallon) in daily life.
Common pressure conversions
| From | To | Units |
|---|---|---|
| 10 psi | 0.6895 bar | pounds per square inch to bars |
| 15 psi | 1.0342 bar | pounds per square inch to bars |
| 20 psi | 1.379 bar | pounds per square inch to bars |
| 25 psi | 1.7237 bar | pounds per square inch to bars |
| 30 psi | 2.0684 bar | pounds per square inch to bars |
| 32 psi | 2.2063 bar | pounds per square inch to bars |
| 35 psi | 2.4132 bar | pounds per square inch to bars |
| 40 psi | 2.7579 bar | pounds per square inch to bars |
| 50 psi | 3.4474 bar | pounds per square inch to bars |
| 60 psi | 4.1369 bar | pounds per square inch to bars |
| 100 psi | 6.8948 bar | pounds per square inch to bars |
| 150 psi | 10.3421 bar | pounds per square inch to bars |
Units in this converter and their exact factors
| Unit | Symbol | One unit in pascals |
|---|---|---|
| pascal | Pa | 1 pascal |
| kilopascal | kPa | 1,000 pascal |
| megapascal | MPa | 1,000,000 pascal |
| bar | bar | 100,000 pascal |
| millibar (hectopascal) | mbar | 100 pascal |
| standard atmosphere | atm | 101,325 pascal |
| pound per square inch | psi | 6,894.757293168 pascal |
| millimetre of mercury | mmHg | 133.322387415 pascal |
| inch of mercury | inHg | 3,386.389 pascal |
FAQFrequently asked questions about pressure conversion
How many bar is 1 psi?
0.0689476 bar.
What is 32 psi in bar?
2.21 bar — a typical car tyre.
What pressure do bike tyres run?
Road tyres often 90–110 psi, which is 6.2–7.6 bar; mountain bike tyres far lower.
Is psi absolute or gauge?
Usually gauge, written psig. Absolute is psia and includes the 14.7 psi of atmospheric pressure.
What is a bar in metric terms?
100 kilopascals, close to average sea-level air pressure.
Where these figures come from
- BIPM — The International System of Units (SI Brochure, 9th edition) — definitions of the base and derived units.
- NIST Special Publication 811 — Guide for the Use of the International System of Units — the exact conversion factors used here.
- National Physical Laboratory (NPL) — United Kingdom's national measurement authority.
Last checked: September 2026. Conversion factors are fixed by definition and do not change with tax years or regulations.