Bar to PSI Converter 2026 | Free Pressure Conversion Tool

Pressure Conversion 2026

Bar to PSI Converter

Accurate conversion between bar and pounds per square inch (PSI)

Convert bar to PSI instantly with precise calculations. Includes reverse PSI to bar conversion, kPa, MPa, atm, inHg, full formula reference, and pressure reference tables for 2026.

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🔧 Bar to PSI Converter 2026

Professional pressure conversion for engineering, automotive, HVAC, diving, and industrial applications

✔ Accurate Bar to PSI Conversions

Convert pressure from bar to pounds per square inch (PSI) using the exact conversion factor: 1 bar = 14.5038 PSI. Whether you are working with tyre pressure, hydraulic systems, gas cylinders, or boiler pressure, our tool delivers precise results. The conversion also outputs kPa, MPa, atm, and inHg for a complete multi-unit pressure breakdown in one step.

✔ Bidirectional Pressure Tool

Switch seamlessly between bar to PSI and PSI to bar conversion modes. Whether you are reading a European pressure gauge in bar and need the PSI equivalent, or converting an American PSI specification to bar for international equipment, both directions are handled instantly from a single input value with no extra steps required.

✔ Practical Applications

Essential for automotive tyre inflation, HVAC and refrigeration systems, scuba diving cylinder pressure, hydraulic machinery, pneumatic tools, boiler and steam systems, water pressure testing, and meteorology in 2026. Correct pressure conversion is critical wherever equipment is specified in one unit but gauges or regulations use another, especially across metric and imperial standards.

🔧 Convert Bar to PSI

Select conversion direction and enter your pressure value below

Enter Pressure — Bar

1 bar = 14.5038 PSI — e.g., 2.5 bar = 36.26 PSI

Enter Pressure — PSI (pounds per square inch)

1 PSI = 0.0689476 bar — e.g., 35 PSI = 2.41 bar

PSI

Equivalent pressure

Complete Pressure Breakdown

Bar

PSI

kPa

MPa

atm

inHg

Step-by-Step Calculation

Input Value —

Conversion Factor —

Result —

Kilopascals (kPa) —

Atmospheres (atm) —

What Is Bar and PSI? — Bar to PSI Explained

The bar is a metric unit of pressure defined as exactly 100,000 pascals (100 kPa). It is widely used in Europe, science, engineering, and industry. One bar is approximately equal to the average atmospheric pressure at sea level (which is technically 1.01325 bar, or 1 atmosphere). The name comes from the Greek word báros, meaning weight.

PSI (pounds per square inch) is an imperial unit of pressure used predominantly in the United States, United Kingdom, and industries that follow American standards. One PSI is the pressure exerted by a one-pound force over an area of one square inch. PSI is the standard unit for tyre pressure, hydraulic systems, and plumbing in countries using the imperial system. You can also explore atmospheres to pascals conversion for related pressure units.

📐 Bar to PSI Formula

PSI = Bar × 14.5038

Bar = PSI ÷ 14.5038 (or PSI × 0.0689476)

kPa = Bar × 100

MPa = Bar ÷ 10

atm = Bar ÷ 1.01325

inHg = Bar × 29.5300

📊 Pressure Unit Scale — 1 Bar Equivalent

1 Bar

→

14.50 PSI

→

100 kPa

→

0.987 atm

1 bar equals 14.5038 PSI, 100 kPa, 0.1 MPa, and 0.9869 atm

1
bar

Car Tyre (Low)

14.5 PSI

2.5
bar

Car Tyre (Normal)

36.3 PSI

7
bar

Road Bicycle

101.5 PSI

200
bar

Scuba Tank

2,901 PSI

Bar to PSI Conversion Table 2026

Use the reference table below for quick Bar to PSI lookups. Common pressure values are listed covering tyre pressure, industrial systems, and high-pressure applications. On mobile, a card layout is displayed for easy reading.

Bar	PSI	kPa	MPa	atm	Common Use
0.1 bar	1.450 PSI	10 kPa	0.010 MPa	0.099 atm	Very low pressure
0.5 bar	7.252 PSI	50 kPa	0.050 MPa	0.493 atm	Partial vacuum
1 bar	14.504 PSI	100 kPa	0.100 MPa	0.987 atm	Near sea-level atmosphere
1.5 bar	21.755 PSI	150 kPa	0.150 MPa	1.480 atm	Truck tyre (light)
2 bar	29.008 PSI	200 kPa	0.200 MPa	1.974 atm	Car tyre (low)
2.5 bar	36.259 PSI	250 kPa	0.250 MPa	2.467 atm	Car tyre (standard)
3 bar	43.511 PSI	300 kPa	0.300 MPa	2.961 atm	Car tyre (high)
4 bar	58.015 PSI	400 kPa	0.400 MPa	3.948 atm	SUV / van tyres
5 bar	72.519 PSI	500 kPa	0.500 MPa	4.935 atm	Mountain bike tyre
7 bar	101.527 PSI	700 kPa	0.700 MPa	6.909 atm	Road bicycle tyre
10 bar	145.038 PSI	1,000 kPa	1.000 MPa	9.869 atm	Industrial air lines
15 bar	217.557 PSI	1,500 kPa	1.500 MPa	14.804 atm	Hydraulic systems
20 bar	290.075 PSI	2,000 kPa	2.000 MPa	19.738 atm	Water jet cleaning
50 bar	725.189 PSI	5,000 kPa	5.000 MPa	49.346 atm	High-pressure hydraulics
100 bar	1,450.377 PSI	10,000 kPa	10.000 MPa	98.692 atm	Deep-sea / industrial
200 bar	2,900.755 PSI	20,000 kPa	20.000 MPa	197.385 atm	Scuba cylinder
300 bar	4,351.132 PSI	30,000 kPa	30.000 MPa	296.077 atm	Paintball / fire extinguisher

Low Pressure (0.1 – 1 bar)

0.1 bar1.450 PSI / 10 kPa

0.5 bar7.252 PSI / 50 kPa

1 bar14.504 PSI / 100 kPa

Tyre Pressure (1.5 – 5 bar)

1.5 bar21.755 PSI / 150 kPa

2 bar29.008 PSI / 200 kPa

2.5 bar36.259 PSI / 250 kPa

3 bar43.511 PSI / 300 kPa

4 bar58.015 PSI / 400 kPa

5 bar72.519 PSI / 500 kPa

Industrial Pressure (7 – 20 bar)

7 bar101.527 PSI / 700 kPa

10 bar145.038 PSI / 1,000 kPa

15 bar217.557 PSI / 1,500 kPa

20 bar290.075 PSI / 2,000 kPa

High Pressure (50 – 300 bar)

50 bar725.189 PSI / 5,000 kPa

100 bar1,450.377 PSI / 10,000 kPa

200 bar2,900.755 PSI / 20,000 kPa

300 bar4,351.132 PSI / 30,000 kPa

How to Convert Bar to PSI — Step by Step

Converting bar to PSI is straightforward using the exact conversion factor. Follow these steps for any bar to PSI calculation in 2026:

Identify your pressure in bar — for example, a car tyre inflated to 2.5 bar.
Multiply by 14.5038 — the exact factor to convert bar to PSI.
Result: 2.5 × 14.5038 = 36.26 PSI.
For the reverse (PSI to bar), divide your PSI value by 14.5038 — e.g., 36.26 ÷ 14.5038 = 2.5 bar.
Use the converter tool above for instant multi-unit results including kPa, MPa, atm, and inHg.

✅ Quick Reference

Standard car tyre pressure: 2.2–2.5 bar = 32–36 PSI. Normal atmospheric pressure: 1.01325 bar = 14.696 PSI. A scuba cylinder at 200 bar holds 2,901 PSI.

Bar to PSI — Key Pressure Facts 2026

🚗 Automotive Tyre Pressure

Most passenger car tyres are inflated to 2.0–2.5 bar (29–36 PSI). Checking tyre pressure regularly improves fuel efficiency by up to 3% and extends tyre life. Under-inflation by just 0.5 bar (7 PSI) increases tyre wear significantly and raises fuel consumption.

🤿 Scuba Diving Cylinders

Standard scuba cylinders are filled to 200–300 bar (2,901–4,351 PSI). Aluminium cylinders are typically rated at 207 bar (3,000 PSI) and steel cylinders up to 300 bar (4,351 PSI). Pressure gauges on regulators and tanks display in both bar and PSI depending on region.

⚙️ Industrial & Hydraulic Systems

Industrial hydraulic systems commonly operate between 150–350 bar (2,176–5,076 PSI). Pneumatic workshop tools typically require 6–8 bar (87–116 PSI) supply pressure. High-pressure water jet cutters operate at 1,000–4,000 bar (14,504–58,015 PSI).

☕ Espresso Machines

Commercial and home espresso machines extract coffee at approximately 9 bar (130.5 PSI), which is the industry-standard pressure recommended for optimal extraction. Machines commonly feature a 15-bar pump, but a pressure regulator reduces it to 9 bar at the group head.

🌊 Water Supply Pressure

Residential water mains typically operate at 2–5 bar (29–73 PSI). The recommended household water pressure is 3–4 bar (43–58 PSI). Pressures above 5 bar (73 PSI) can damage appliances and pipework, and pressure-reducing valves are installed to protect systems.

🌡️ Atmospheric Pressure

Standard atmospheric pressure at sea level is 1.01325 bar, which equals exactly 14.696 PSI or 101,325 Pa. Weather pressure readings typically range between 0.95 bar (950 hPa) in low-pressure storms and 1.04 bar (1,040 hPa) in high-pressure systems.

ℹ️ Bar vs PSI — Which Unit to Use in 2026?

Bar is the standard in Europe, Australia, and most metric-system countries. PSI remains dominant in the USA, UK automotive sector, and industries using American standards. Most modern gauges display both units. For international engineering documentation, kPa or MPa (SI units) are preferred for formal specifications, with bar and PSI used for practical field work. You can also explore atmospheres to pascals for further pressure unit context.

⚠️ Important — Gauge Pressure vs Absolute Pressure

Pressure can be expressed as gauge pressure (barg / psig) — measured relative to atmospheric pressure — or absolute pressure (bara / psia) — measured relative to a perfect vacuum. A tyre inflated to 2.5 bar gauge (barg) has an absolute pressure of approximately 3.51 bara. Always confirm whether a specification uses gauge or absolute pressure before converting, especially in safety-critical applications.

Bar to PSI — Frequently Asked Questions 2026

How many PSI is 1 bar?

1 bar equals exactly 14.5038 PSI (pounds per square inch). This is the internationally accepted conversion factor. Rounded for everyday use: 1 bar ≈ 14.5 PSI. So 2 bar = 29.0 PSI, 3 bar = 43.5 PSI, and so on.

How many bar is 1 PSI?

1 PSI equals 0.0689476 bar (approximately 0.069 bar). To convert PSI to bar, divide your PSI value by 14.5038 or multiply by 0.0689476. For example, 35 PSI ÷ 14.5038 = 2.413 bar.

What is 2.5 bar in PSI for car tyres?

2.5 bar = 36.26 PSI. This is a typical recommended tyre pressure for many standard passenger cars. Always check your vehicle's door placard or owner's manual for the correct specification, as optimal tyre pressure varies by vehicle, load, and tyre type.

Is bar and atm the same?

No — they are very close but not the same. 1 standard atmosphere (atm) = 1.01325 bar = 14.696 PSI. 1 bar = 0.986923 atm = 14.5038 PSI. The bar was defined to be a round number close to atmospheric pressure, making the two units approximately equal for most practical purposes, but they should not be used interchangeably in precise engineering or scientific work.

How do I convert bar to kPa?

To convert bar to kilopascals (kPa), simply multiply by 100. So 1 bar = 100 kPa, 2.5 bar = 250 kPa, and 10 bar = 1,000 kPa. This is because 1 bar is defined as 100,000 Pa (pascals), and 1 kPa = 1,000 Pa, making the bar-to-kPa conversion one of the simplest in pressure measurement.

What is 200 bar in PSI for a scuba tank?

200 bar = 2,900.76 PSI (approximately 2,901 PSI). Standard aluminium scuba cylinders are rated to 207 bar (3,000 PSI) and steel cylinders up to 300 bar (4,351 PSI). Always have scuba cylinders inspected and filled by a certified dive centre — never overfill beyond the rated working pressure.

What is the difference between PSI and bar for tyre pressure?

PSI and bar are simply different units measuring the same thing — pressure. European vehicles and most metric-country gauges display tyre pressure in bar, while American vehicles use PSI. A typical recommended car tyre pressure of 2.3 bar equals 33.4 PSI, and 2.5 bar equals 36.3 PSI. Most modern tyre gauges display both units for convenience.

Pressure Conversion Resources 2026

🔧 Tyre Pressure Guide

Most passenger cars require 2.0–2.5 bar (29–36 PSI). Check your door jamb sticker for the manufacturer's recommended tyre pressure in both bar and PSI. Inflate when tyres are cold for accurate readings.

Explore Pressure Units →

⚙️ Industrial Pressure Reference

Hydraulic systems, pneumatic tools, and compressed gas cylinders are specified in both bar and PSI. Use this converter to cross-reference metric and imperial specifications when working with international equipment documentation.

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📚 Pressure Unit Standards

The International System of Units (SI) uses the pascal (Pa) as the base unit of pressure. Bar and PSI are derived units accepted for practical use. 1 bar = 100,000 Pa = 100 kPa = 0.1 MPa = 14.5038 PSI = 0.9869 atm.

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