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.
Australia is fully metric under the National Measurement Act 1960; imperial units appear only in trade with the US and in older documents.
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 Measurement Institute (NMI) — Australia's national measurement authority.
Last checked: September 2026. Conversion factors are fixed by definition and do not change with tax years or regulations.