PSI to Bar Calculator
1 pound per square inch (psi) equals 0.0689476 bar, derived from the relationship 1 bar = 100,000 Pa exactly and 1 psi = 6,894.757 Pa, giving the conversion 1 psi = 6,894.757 /...
Formula
Source: Engineering Toolbox | Last reviewed: June 7, 2026
Examples
1 psi
= 0.06895 bar
14.5038 psi
= 1 bar
1 bar = 14.5038 psi
100 psi
= 6.895 bar
1000 psi
= 68.95 bar
Quick Reference Table
| psi | bar |
|---|---|
| 0 | 0 |
| 10 | 0.689 |
| 20 | 1.379 |
| 30 | 2.069 |
| 50 | 3.447 |
| 100 | 6.895 |
Popular Conversions
Quick answers for the most-searched psi to bar values.
30 psi to bar
30 psi = 2.068 bar
Typical air compressor cutoff pressure. Most small shop compressors cycle between 0-2 bar (0-30 psi) or up to 8 bar (120 psi). 30 psi = 2.07 bar is the most common cutoff.
100 psi to bar
100 psi = 6.895 bar
Standard industrial compressed air pressure. 100 psi (6.89 bar) is the near-universal plant compressed air header pressure — pneumatic tools, actuators, and process air all operate at this level.
3000 psi to bar
3000 psi = 206.8 bar
Hydraulic system standard. 3000 psi (206.8 bar) is the most common hydraulic power unit pressure rating for industrial machinery, presses, and mobile equipment.
40 psi to bar
40 psi = 2.758 bar
Domestic water pressure. 40-60 psi (2.76-4.14 bar) is the standard municipal water supply pressure range for residential and light commercial buildings.
14.5 psi to bar
14.5038 psi = 1 bar
The exact conversion: 1 bar = 14.5038 psi. Use this as a calibration check — many engineers memorize this specific pair for mental quick estimates.
80 psi to bar
80 psi = 5.516 bar
Pneumatic tool operating pressure. Most pneumatic impact wrenches, nailers, and spray guns are rated at 80-90 psi (5.5-6.2 bar) for optimal torque and performance.
Where is this used?
When reading US equipment in Europe or vice versa, this is the most common conversion you'll need.
In the global pneumatic tools market, US-made tools (Ingersoll Rand, Chicago Pneumatic, Snap-on) are rated for 90 psi operating pressure, while European and Japanese tools (Atlas Copco, Bosch Professional, Makita, Festo) are rated for 6.3 bar (91.4 psi) — the conversion is essential when stocking tools and matching air compressors across regions.
Compressed air system design uses 100 psi (6.895 bar) in the US and 6–8 bar (87–116 psi) in Europe, with the conversion applied at the system design boundary.
Diving and hyperbaric applications: scuba tanks are rated 200 bar (2,901 psi) in Europe and 3,000 psi (206.8 bar) in the US, with the conversion required for international dive operations and for tank hydrostatic test certificates.
SCUBA regulator performance (intermediate pressure, first stage test pressure) is specified in bar in European equipment and in psi in US equipment, with the same physical pressure being communicated in different units.
Automotive tire pressure is specified in bar in most of the world (a typical passenger car tire at 2.2 bar / 32 psi) but in psi in the US — the conversion is the most common consumer-facing pressure conversion and is built into most digital tire pressure gauges with dual-unit displays.
Industrial gas cylinder pressures for compressed air, nitrogen, oxygen, and argon are universally 200 bar (2,900 psi) at 15°C in Europe and 2,640 psi (182 bar) in the US for the same physical cylinder; the conversion appears on every cylinder rental invoice and in every gas consumption calculation.
Hydraulic system pressures are typically 3,000 psi (207 bar) for US industrial hydraulics and 200–350 bar (2,900–5,076 psi) for European hydraulics, with the conversion required when integrating components from different regional sources.
Refrigerant cylinder charging pressures for R-410A, R-134a, R-22, and R-32 are specified in psig in the US and bar in Europe, with the conversion essential for HVAC service technicians who must read the same physical pressure in their local unit system.
Pressure vessel and piping design codes use bar in Europe (PED 2014/68/EU, EN 13445) and psi in the US (ASME BPVC Section VIII), with international projects requiring both sets of calculations in their respective unit systems for code compliance — a 10 bar design pressure vessel is the same physical vessel as one designed for 145 psi, but the calculation sheets must carry the value in the unit expected by the local authority having jurisdiction.
Industry Standards Referenced
Frequently Asked Questions
Is bar the same as atm?
No. 1 bar = 0.98692 atm, so they're nearly identical but not exact. 1 bar = 100,000 Pa exactly; 1 atm = 101,325 Pa.
Why is bar used instead of Pa?
Bar is convenient for industrial pressures (typical range 1–1000 bar). 1 Pa is too small; 1 MPa = 10 bar, used for very high pressures.
What about millibar (mbar)?
1 bar = 1000 mbar. Millibar is common in meteorology and vacuum work. 1 mbar = 100 Pa = 0.0145 psi.
How many psi is 2 bar?
2 bar = 29.01 psi (2 × 14.5038). A typical car tire at 2 bar gauge reads about 29 psi. European bicycles typically run 4–7 bar (58–102 psi).
How do I convert psi to bar in Excel?
Use the formula =A1*0.0689476 where A1 contains the psi value. For bar to psi, use =A1*14.5038. For bulk conversions, create a lookup table or use the CONVERT function: =CONVERT(A1,"psi","Pa")/100000.
Is bar an SI unit?
No. The bar is a non-SI unit accepted for use with the SI. The official SI unit for pressure is the Pascal (Pa). 1 bar = 100,000 Pa exactly. MPa (10 bar) is commonly used in high-pressure hydraulics and is an SI unit.
What does 3000 psi convert to in bar?
3000 psi = 206.8 bar. This is a common rating for hydraulic hoses, high-pressure pumps, and pressure washer systems. Many US-spec hydraulic components operate at 3000 psi while European equivalents are commonly rated at 200 or 210 bar.
Reviewed for accuracy
Reviewed against ASME B31.3 and ISO 4126 standards for pressure equipment · Last reviewed: June 7, 2026
All calculations are for reference only. Always verify with manufacturer data and a qualified engineer for critical applications. Learn about our editorial process.