Convert Bar to Pounds per Square Inch
Instantly convert Bar (bar) to Pounds per Square Inch (psi) with our free online calculator.
Formula: bar to psi — multiply by 14.5038
Reference Table
| Bar (bar) | Pounds per Square Inch (psi) |
|---|---|
| 1 | 14.5038 |
| 5 | 72.5189 |
| 10 | 145.038 |
| 25 | 362.594 |
| 50 | 725.189 |
| 100 | 1450.38 |
How to Convert Bar to Pounds per Square Inch
Formula
To convert Bar (bar) to Pounds per Square Inch (psi): multiply by 14.5038
Step-by-Step
- Start with your value in Bar (bar).
- Multiply by 14.5038 to perform the conversion.
- The result is your value expressed in Pounds per Square Inch (psi).
Conversion Factor
1 bar = 14.5038 psi
Reverse Factor
1 psi = 0.0689476 bar
Worked Example
Convert 25 Bar to Pounds per Square Inch: 25 bar = 362.594 psi
About Bar (bar)
A metric unit of pressure equal to exactly 100,000 pascals (100 kPa), approximately the average sea-level atmospheric pressure on Earth (1 atm = 1.01325 bar). Defined by IUPAC and accepted for use with the SI by the BIPM, the bar is not itself an SI-proper unit but is universally recognized in engineering. Bars are the default unit in European industry for compressed gas systems (compressed air at 6-10 bar shop pressure), hydraulics (mobile equipment at 200-400 bar working pressure), and chemical process plants. Car tire pressures in much of the world outside the US are specified in bar (a typical passenger car runs ~2.2 bar / 32 psi cold). Gauges on scuba cylinders (200 bar fill / ~2900 psi), brewery CO₂ tanks, fire suppression systems, and espresso machines (9 bar extraction pressure) all read in bar. 1 bar = 14.504 psi = 100 kPa = 0.9869 atm.
About Pound per Square Inch (psi)
An imperial unit of pressure equal to one pound-force applied over one square inch (exactly 6,894.757 Pa per NIST SP 811). PSI is the dominant US pressure unit and remains the working unit in most US-built industrial, automotive, and consumer equipment: passenger-car tire inflation (32-35 psi cold), compressed air shop systems (typically 100-150 psi), hydraulic equipment (1,500-3,000 psi mobile, up to 10,000 psi on press brakes), ammunition chamber pressures (SAAMI specs in psi), municipal potable water supply (~40-80 psi at the meter), and natural gas distribution pressures. US engineering textbooks and the ASME B31 pipe codes, API piping specifications, and AWWA waterworks standards quote allowable pressures in psi. Engineers should distinguish gauge psi (psig — pressure above atmospheric) from absolute psi (psia — pressure above perfect vacuum); 0 psig = 14.696 psia at sea level. 1 psi = 6.895 kPa = 0.0689 bar = 51.715 mmHg.
Quick Facts
- 1 Bar equals 14.5038 Pounds per Square Inch
- 1 Pound per Square Inch equals 0.0689476 Bar
- Bar is a unit of pressure
- Pound per Square Inch is a unit of pressure
- This conversion is commonly used in tire inflation, weather reporting, scuba diving, and engineering
- The Bar belongs to the metric system
- The Pound per Square Inch belongs to the imperial system
Common Bar to Pound per Square Inch Conversions
| Bar (bar) | Pounds per Square Inch (psi) |
|---|---|
| 0.1 | 1.45038 |
| 0.5 | 7.25189 |
| 1 | 14.5038 |
| 2 | 29.0075 |
| 5 | 72.5189 |
| 10 | 145.038 |
| 14.696 | 213.147 |
| 15 | 217.557 |
| 20 | 290.075 |
| 25 | 362.594 |
| 50 | 725.189 |
| 100 | 1450.38 |
| 150 | 2175.57 |
| 200 | 2900.75 |
| 500 | 7251.89 |
| 1000 | 14503.8 |
Understanding Bar
The Bar (symbol: bar) is a unit of pressure. A metric unit of pressure equal to exactly 100,000 pascals (100 kPa), approximately the average sea-level atmospheric pressure on Earth (1 atm = 1.01325 bar). Defined by IUPAC and accepted for use with the SI by the BIPM, the bar is not itself an SI-proper unit but is universally recognized in engineering. Bars are the default unit in European industry for compressed gas systems (compressed air at 6-10 bar shop pressure), hydraulics (mobile equipment at 200-400 bar working pressure), and chemical process plants. Car tire pressures in much of the world outside the US are specified in bar (a typical passenger car runs ~2.2 bar / 32 psi cold). Gauges on scuba cylinders (200 bar fill / ~2900 psi), brewery CO₂ tanks, fire suppression systems, and espresso machines (9 bar extraction pressure) all read in bar. 1 bar = 14.504 psi = 100 kPa = 0.9869 atm.
It belongs to the metric measurement system.
Bar are commonly used in tire inflation, weather reporting, scuba diving, and engineering.
Understanding Pounds per Square Inch
The Pound per Square Inch (symbol: psi) is a unit of pressure. An imperial unit of pressure equal to one pound-force applied over one square inch (exactly 6,894.757 Pa per NIST SP 811). PSI is the dominant US pressure unit and remains the working unit in most US-built industrial, automotive, and consumer equipment: passenger-car tire inflation (32-35 psi cold), compressed air shop systems (typically 100-150 psi), hydraulic equipment (1,500-3,000 psi mobile, up to 10,000 psi on press brakes), ammunition chamber pressures (SAAMI specs in psi), municipal potable water supply (~40-80 psi at the meter), and natural gas distribution pressures. US engineering textbooks and the ASME B31 pipe codes, API piping specifications, and AWWA waterworks standards quote allowable pressures in psi. Engineers should distinguish gauge psi (psig — pressure above atmospheric) from absolute psi (psia — pressure above perfect vacuum); 0 psig = 14.696 psia at sea level. 1 psi = 6.895 kPa = 0.0689 bar = 51.715 mmHg.
It belongs to the imperial measurement system.
Pounds per Square Inch are commonly used in tire inflation, weather reporting, scuba diving, and engineering.
Why Convert Bar to Pounds per Square Inch?
Engineers, mechanics, and scientists frequently need to convert pressure between Bar and Pounds per Square Inch when working with different measurement standards. Tire pressure, blood pressure readings, weather barometric measurements, and industrial process specifications may all use different pressure units depending on the region or discipline. Reliable conversion prevents equipment misuse and ensures safety.
Frequently Asked Questions
How do I convert Bar to Pounds per Square Inch?
A metric unit of pressure equal to exactly 100,000 pascals (100 kPa), approximately the average sea-level atmospheric pressure on Earth (1 atm = 1. To convert Bar to Pounds per Square Inch, multiply by 14.5038. For example, 25 bar equals 362.594 psi.
How many Pounds per Square Inch are in 1 Bar?
There are 14.5038 Pounds per Square Inch in 1 Bar.
How many Bar are in 1 Pound per Square Inch?
There are 0.0689476 Bar in 1 Pound per Square Inch.
What is the formula for Bar to Pound per Square Inch conversion?
The formula is: multiply by 14.5038. This means 1 bar = 14.5038 psi.
Is a Bar bigger than a Pound per Square Inch?
No. One Bar is smaller than one Pound per Square Inch because 1 bar equals 14.5038 psi, which is greater than 1.
When do you need to convert between Bar and Pounds per Square Inch?
An imperial unit of pressure equal to one pound-force applied over one square inch (exactly 6,894. Bar and Pound per Square Inch are both pressure units, so conversion comes up whenever one source of information uses one unit and another uses the other — a classic cross-reference challenge in engineering, trade, travel, and everyday life.