Bar to Psi Converter
Enter the value that you want to convert bar to psi or psi to bar.
1 bar = 14.5037738 psi
Formula: psi = bar value × 14.5037738
bar to psi
10 bar = 145.03774 psi
Popular Pressure Converters:
How Bar Relates to Psi
The Bar in Engineering
Bar (bar) is a unit of pressure measurement. 1 bar is equal to 14.5037738 psi.
What is Psi?
Psi (psi) is a unit of pressure measurement. 1 psi is equal to 0.0689476 bar.
Pressure Units Across Industries
Pressure measurements vary dramatically by industry. Meteorologists report in millibars or hectopascals, tire shops use PSI, scuba divers think in atmospheres or bar, vacuum engineers work in torr, and hydraulic systems specify in megapascals. A single industrial plant might encounter all these units across different equipment manuals, safety datasheets, and regulatory standards from different countries.
bar to psi metric conversion table
| 0.01 bar | = | 0.14504 psi |
| 0.1 bar | = | 1.45038 psi |
| 1 bar | = | 14.50377 psi |
| 2 bar | = | 29.00755 psi |
| 3 bar | = | 43.51132 psi |
| 4 bar | = | 58.01510 psi |
| 5 bar | = | 72.51887 psi |
| 6 bar | = | 87.02264 psi |
| 7 bar | = | 101.52642 psi |
| 8 bar | = | 116.03019 psi |
| 9 bar | = | 130.53396 psi |
| 10 bar | = | 145.03774 psi |
| 11 bar | = | 159.54151 psi |
| 12 bar | = | 174.04529 psi |
| 13 bar | = | 188.54906 psi |
| 14 bar | = | 203.05283 psi |
| 15 bar | = | 217.55661 psi |
| 16 bar | = | 232.06038 psi |
| 17 bar | = | 246.56415 psi |
| 18 bar | = | 261.06793 psi |
| 19 bar | = | 275.57170 psi |
| 20 bar | = | 290.07548 psi |
| 30 bar | = | 435.11321 psi |
| 40 bar | = | 580.15095 psi |
| 50 bar | = | 725.18869 psi |
| 60 bar | = | 870.22643 psi |
| 70 bar | = | 1015.26416 psi |
| 80 bar | = | 1160.30190 psi |
| 90 bar | = | 1305.33964 psi |
| 100 bar | = | 1450.37738 psi |
| 200 bar | = | 2900.75475 psi |
| 300 bar | = | 4351.13213 psi |
| 400 bar | = | 5801.50951 psi |
| 500 bar | = | 7251.88689 psi |
| 600 bar | = | 8702.26426 psi |
| 700 bar | = | 10152.64164 psi |
| 800 bar | = | 11603.01902 psi |
| 900 bar | = | 13053.39640 psi |
| 1000 bar | = | 14503.77377 psi |
How to Convert Bar to Psi?
We can convert bar to psi by using an example.
Example:
Convert 20 Bar to Psi?
We know 1 Bar = 14.5037738 psi; 1 Psi = 0.0689476 bar.
20 bar = ___psi
20 × 14.5037738 = 290.07548 psi (we know 1 bar = 14.5037738 psi)
Answer:
20 bar = 290.07548 psi
How to Convert Bar to PSI (Step-by-Step)
Converting bar to PSI (pounds per square inch) is essential when working with tire pressures, hydraulic systems, and industrial equipment that bridges European and American standards. The conversion factor is 1 bar = 14.5038 PSI.
- Write down the pressure value in bar.
- Multiply the bar value by 14.5038.
- The result is the equivalent pressure in PSI.
- For a quick mental estimate, multiply by 14.5 or think of 1 bar ≈ 15 PSI (overshoots by ~3%).
Common Bar to PSI Conversions
Reference table of pressures encountered in automotive, diving, and industrial applications converted from bar to PSI.
| Bar | Psi |
|---|---|
| 1 bar | 14.50 PSI |
| 2.0 bar | 29.01 PSI |
| 2.2 bar | 31.91 PSI |
| 2.5 bar | 36.26 PSI |
| 3.0 bar | 43.51 PSI |
| 6.9 bar | 100.08 PSI |
| 10 bar | 145.04 PSI |
| 200 bar | 2900.75 PSI |
| 350 bar | 5076.33 PSI |
Solved Examples: Bar to PSI
Question 1: Your European car manual recommends 2.3 bar for the front tires. What is this in PSI for a US tire gauge?
Solution:
Pressure in PSI = Pressure in bar × 14.5038
= 2.3 × 14.5038
= 33.3587 PSI
Answer: 2.3 bar = 33.36 PSI. Set your tire gauge to 33 PSI.
Question 2: A hydraulic press operates at 150 bar. What is the operating pressure in PSI?
Solution:
Pressure in PSI = 150 × 14.5038
= 2175.57 PSI
Answer: 150 bar = 2175.57 PSI — typical for a medium-duty hydraulic press.
Question 3: A SCUBA tank is filled to 232 bar. Express this in PSI.
Solution:
Pressure in PSI = 232 × 14.5038
= 3364.88 PSI
Answer: 232 bar = 3364.88 PSI (standard aluminum 80 tank fill).
Question 4: An espresso machine brews at 9 bar. What is this in PSI?
Solution:
Pressure in PSI = 9 × 14.5038
= 130.53 PSI
Answer: 9 bar = 130.53 PSI — the standard espresso extraction pressure.
Practice Questions: Bar to PSI
Try solving these on your own to test your understanding:
- Convert 2.8 bar to PSI. (Answer: 40.61 PSI)
- A compressor delivers 8 bar. What is this in PSI? (Answer: 116.03 PSI)
- Convert 0.5 bar to PSI. (Answer: 7.25 PSI)
- A fire extinguisher is pressurized to 14 bar. Express in PSI. (Answer: 203.05 PSI)
- Convert 300 bar (industrial cylinder) to PSI. (Answer: 4351.13 PSI)
Why European and American Tire Pressures Use Different Units
European countries adopted the metric system in the 19th century and naturally gravitated toward bar for tire pressure — it maps neatly to atmospheric pressure (1 atm ≈ 1.013 bar). The United States retained PSI because its industrial infrastructure, pipe fittings, and gauges were all calibrated in imperial units. Today, most digital tire gauges sold globally display both units, but tire placard stickers on European cars show bar while US-market vehicles show PSI.
Bar to PSI in Hydraulic Systems
Industrial hydraulics commonly operate between 100-350 bar (1450-5076 PSI). Excavators use 250-350 bar, forklifts 150-200 bar, and aircraft hydraulics 210 bar (3000 PSI). When ordering replacement hoses, fittings, or seals from international suppliers, verifying the pressure rating in both bar and PSI prevents catastrophic failures. Always use the rated burst pressure (typically 4× working pressure) when selecting components.
SCUBA Diving Pressure Conversions
SCUBA tanks worldwide are rated in bar (typically 200-300 bar when full), but many US-trained divers think in PSI. A standard aluminum 80 tank holds 207 bar (3000 PSI), while a steel HP100 fills to 248 bar (3600 PSI). The "rule of thirds" for gas management (1/3 out, 1/3 back, 1/3 reserve) is easier to apply when you know both units. At depth, ambient pressure increases by 1 bar per 10 meters.
Key Takeaways
- Multiply bar by 14.5038 to get PSI (or approximate with ×14.5).
- 1 bar ≈ 14.5 PSI — slightly less than 1 standard atmosphere.
- Typical car tires: 2.0-2.5 bar = 29-36 PSI.
- Hydraulic systems: 100-350 bar = 1450-5076 PSI.
- SCUBA tanks: 200-300 bar = 2900-4350 PSI.
- Always verify which unit a gauge reads before inflating or pressurizing.
Bar to Psi Conversion Formula
psi = bar × 14.5037738
1 bar = 14.5037738 psi
1 psi = 0.0689476 bar
Reverse: bar = psi × 0.0689476
Frequently Asked Questions
How many psi are in 1 bar?
There are 14.5037738 psi in 1 bar. To convert bar to psi, multiply the value by 14.5037738.
How do I convert bar to psi?
Multiply your bar value by 14.5037738 to get the equivalent in psi. For example, 5 bar = 5 × 14.5037738 = 72.51887 psi.
How do I convert psi to bar?
Multiply your psi value by 0.0689476 to get the equivalent in bar. Alternatively, divide by 14.5037738.
What is 10 bar in psi?
10 bar is equal to 145.03774 psi.
What is 100 bar in psi?
100 bar is equal to 1450.37738 psi.