bar to psi Converter
Convert bar to psi for reading European tire and equipment pressure specs in US units.
How It Works
Formula: bar to psi = value × 14.5037738
Example: 2 bar = 29.007548 psi
Note: 1 bar equals 14.504 psi, the conversion from metric pressure to US tire and equipment readings.
Common Uses
Quick Conversion Table
| bar | psi |
|---|---|
| 10 | 145.0377 |
| 30 | 435.1132 |
| 50 | 725.1887 |
| 100 | 1450 |
| 200 | 2901 |
Rounding Rule
Rounded to 2 decimal places
Error Margin
±0.01 psi
Precision Guidance
For tires, round to 1 decimal. For industrial use, keep 2 decimals.
Common Mistakes
1 bar is about 14.5 psi, not 1 psi. A 2.0 bar reading is roughly 29 psi, not 2 psi.
Frequently Asked Questions
What is 1 bar in psi?
1 bar equals 14.504 psi using the conversion 1 bar = 14.5038 psi.
How do I convert bar to psi?
Multiply the bar value by 14.504. For example, 2.2 bar × 14.504 = 31.91 psi.
What is 2.3 bar in psi for a tire?
2.3 bar equals about 33.36 psi, a common tire pressure.
Is 1 bar the same as 1 atmosphere?
1 bar (14.504 psi) is slightly less than 1 standard atmosphere (14.696 psi).
Deep Dive Guide
Bar to Psi Conversion Guide for Imported Vehicles and Tires
Convert bar to psi accurately for US drivers servicing imported European and Asian vehicles. Learn the 14.5038 factor and tire pressure best practices.
Read Full Guide →More Converters You May Like
Exact Constants & Authoritative Sources
Every conversion on this page uses the fixed, internationally agreed constants below — drawn from NIST and the SI Brochure. No values are estimated or rounded as if exact. See the full list on our Sources & Standards page.
- EXACT1 standard atmosphere (atm) = 101,325 pascals (exact)
- EXACT1 bar = 100,000 pascals (exact, definition)
- EXACT1 psi = 6894.757293168 pascals (exact, 1 lbf/in²)
- EXACT1 kilopascal (kPa) = 1000 pascals (definition)
Common Pitfalls & How to Avoid Them
psi vs. bar vs. kPa
1 bar ≈ 14.5038 psi; 1 atm = 14.6959 psi = 101.325 kPa. Tire pressures are usually psi (US) or bar (EU) — a 2.3 bar tire is ~33 psi, not 23.
Gauge vs. absolute
Tire and tire-inflation tools read gauge pressure (psig), relative to atmosphere. Adding 1 atm gives absolute (psia). Use the right one in engineering calculations.
A unit-conversion reference site has no manufacturer-specific or device calibration parameters, so "layered tuning" does not apply here. The only real error-handling is input validation: the converter rejects non-numeric, empty, or out-of-range entries and shows a clear message, then falls back to exact constants above. No estimated or rounded figures are ever presented as exact.
Authoritative sources for this page
- NIST (U.S. National Institute of Standards and Technology) — NIST SP 330 — The International System of Units (SI), 2019 edition
- BIPM (International Bureau of Weights and Measures) — SI Brochure — The International System of Units (9th edition)
Last Updated 2026 | This converter was reviewed for accuracy