Pressure is something we use every day. We find it in car tires, weather reports, machines, water pipes, and many other places.
Pressure Converter
Convert pressure quickly and easily.
Different countries and industries use different pressure units. This can make it hard to understand a pressure value.
Our Pressure Converter helps you change one pressure unit into another in seconds. You can convert Pascal, kilopascal, bar, PSI, atmosphere, Torr, and many more units.
Just enter a number, choose the unit you have, and select the unit you want. The converter will show the result quickly and easily.
What Is a Pressure Converter?
A pressure converter is an online tool that changes pressure from one unit to another.
For example, you may have a pressure value in PSI and need to know the same value in bar. Instead of doing the math yourself, you can use our online pressure converter.
The tool helps you convert:
- Pascal (Pa)
- Kilopascal (kPa)
- Megapascal (MPa)
- Bar (bar)
- Millibar (mbar)
- Standard atmosphere (atm)
- Technical atmosphere (at)
- Pounds per square inch (psi)
- Torr (Torr)
- Millimeters of mercury (mmHg)
- Inches of mercury (inHg)
- Kilogram-force per square centimeter (kgf/cm²)
The converter is useful for students, workers, drivers, engineers, and anyone who needs to change pressure measurements.
Pressure Converter Calculator
Use the pressure converter above to change between different pressure units.
Follow these simple steps:
- Enter the pressure value you want to convert.
- Select the unit you are using.
- Select the unit you want to get.
- Read the result.
For example, enter 30 in the PSI field and choose bar as the result unit. The converter will show that 30 PSI is about 2.068 bar.
You can use the tool for small or large pressure values.
Pressure Units and Their Symbols
Pressure can be measured in different units. Each unit has a name and a symbol.
The table below shows the pressure units included in our converter.
| Pressure Unit | Symbol |
|---|---|
| Pascal | Pa |
| Kilopascal | kPa |
| Megapascal | MPa |
| Bar | bar |
| Millibar | mbar |
| Standard atmosphere | atm |
| Technical atmosphere | at |
| Pounds per square inch | psi |
| Torr | Torr |
| Millimeters of mercury | mmHg |
| Inches of mercury | inHg |
| Kilogram-force per square centimeter | kgf/cm² |
These units measure the same thing: pressure. However, their values are different.
For example, 1 bar is equal to 100,000 pascals. This means the same pressure can be written as 1 bar or 100,000 Pa.
What Is Pressure?
Pressure tells us how much force acts on a certain area.
Imagine pressing your hand against a table. Your hand pushes on the table. This is a simple example of force.
Pressure depends on two things:
- The force applied.
- The size of the area where the force acts.
When the same force acts on a smaller area, the pressure is higher.
For example, a sharp nail can enter wood more easily than a flat piece of metal. The nail puts the force on a very small area, creating more pressure.
Pressure is important in many parts of everyday life.
We use pressure measurements in car tires, air compressors, water systems, weather reports, factories, and scientific work.
Common Pressure Units Explained
1. Pascal (Pa)
The pascal is the standard unit of pressure in the International System of Units.
Its symbol is Pa.
One pascal is a small amount of pressure. For this reason, larger units such as kPa and MPa are often used.
Example:
1 bar = 100,000 Pa.
Pascal is commonly used in science, engineering, and technical measurements.
2. Kilopascal (kPa)
The kilopascal is equal to 1,000 pascals.
Its symbol is kPa.
It is often used to measure tire pressure, gas pressure, and other types of pressure.
Example:
100 kPa = 1 bar.
Kilopascals are useful when the pressure value is too large to write comfortably in pascals.
3. Megapascal (MPa)
The megapascal is equal to 1,000,000 pascals.
Its symbol is MPa.
It is used for high pressure, such as in hydraulic systems, industrial machines, and engineering.
Example:
1 MPa = 10 bar.
4. Bar (bar)
Bar is a common pressure unit used in many countries.
It is often used for tire pressure, pumps, compressors, and industrial equipment.
Example:
1 bar = 100 kPa.
Bar is close to the average air pressure at sea level, but it is not exactly the same as one standard atmosphere.
5. Millibar (mbar)
The millibar is one thousandth of a bar.
Its symbol is mbar.
Millibars are commonly used in weather reports to measure air pressure.
Example:
1 bar = 1,000 mbar.
Weather reports may show atmospheric pressure in millibars or hectopascals (hPa). One millibar is equal to one hectopascal.
6. Standard Atmosphere (atm)
The standard atmosphere is a pressure unit based on average air pressure at sea level under standard conditions.
Its symbol is atm.
One standard atmosphere is exactly 101,325 pascals.
It is often used in science and chemistry.
Example:
1 atm = 101.325 kPa.
7. Technical Atmosphere (at)
The technical atmosphere is a pressure unit based on kilogram-force per square centimeter.
Its symbol is at.
It is sometimes used in older technical documents and engineering measurements.
Example:
1 at = 98,066.5 Pa.
The technical atmosphere is not the same as the standard atmosphere.
8. PSI (psi)
PSI means pounds per square inch.
It measures pressure by comparing force in pounds with an area of one square inch.
PSI is widely used in the United States for car tires, bicycle tires, air compressors, and other equipment.
Example:
1 psi is approximately 6.895 kPa.
If a tire requires 32 PSI, the same pressure is about 2.206 bar.
9. Torr (Torr)
Torr is a pressure unit often used in science and vacuum systems.
It is related to the standard atmosphere.
Example:
1 Torr is approximately 133.322 Pa.
Torr is useful when measuring low pressure, such as in vacuum equipment.
10. Millimeters of Mercury (mmHg)
Millimeters of mercury is a unit used to measure pressure.
Its symbol is mmHg.
It is commonly used in medical blood pressure readings and some scientific measurements.
Example:
760 mmHg is equal to one standard atmosphere.
Blood pressure readings are often written using mmHg.
11. Inches of Mercury (inHg)
Inches of mercury is another pressure unit.
Its symbol is inHg.
It is often used in weather reports, aviation, and some pressure gauges.
Example:
29.92 inHg is approximately one standard atmosphere.
12. Kilogram-Force per Square Centimeter (kgf/cm²)
This unit measures pressure using kilogram-force over an area of one square centimeter.
Its symbol is kgf/cm².
It may appear in older engineering documents, pressure gauges, and industrial equipment.
Example:
1 kgf/cm² = 98,066.5 Pa.
It is close to one technical atmosphere.
Common Pressure Conversion Table
The following table shows common pressure values and their approximate equivalents.
| Pressure | Equivalent |
|---|---|
| 1 bar | 100 kPa |
| 1 bar | 0.1 MPa |
| 1 bar | 100,000 Pa |
| 1 atm | 101.325 kPa |
| 1 atm | 1.01325 bar |
| 1 atm | 14.6959 psi |
| 1 atm | 760 Torr |
| 1 atm | 760 mmHg |
| 1 atm | 29.9213 inHg |
| 1 psi | 6.89476 kPa |
| 1 psi | 0.0689476 bar |
| 1 MPa | 10 bar |
| 1 kPa | 1,000 Pa |
| 1 kgf/cm² | 98.0665 kPa |
Values are rounded where needed. The exact result may contain more decimal places.
How to Convert Pressure Units
You can convert pressure by using a conversion factor.
A conversion factor is a number used to change one unit into another.
Here are some simple examples.
Example 1: Convert Bar to PSI
Suppose you have 2 bar and want to know the value in PSI.
The conversion factor is:
1 bar = 14.5038 psi.
Multiply:
2 × 14.5038 = 29.0076 psi.
Result:
2 bar is approximately 29.01 PSI.
Example 2: Convert PSI to Bar
Suppose a tire gauge shows 35 PSI. You want to know the value in bar.
The conversion factor is:
1 psi = 0.0689476 bar.
Multiply:
35 × 0.0689476 = 2.413166 bar.
Result:
35 PSI is approximately 2.413 bar.
Example 3: Convert kPa to PSI
Suppose you have 200 kPa.
To convert kPa to PSI, multiply by approximately 0.145038.
200 × 0.145038 = 29.0076 psi.
Result:
200 kPa is approximately 29.01 PSI.
Example 4: Convert MPa to Bar
Suppose you have 3 MPa.
One MPa is equal to 10 bar.
3 × 10 = 30 bar.
Result:
3 MPa is equal to 30 bar.
Our online pressure converter does these calculations for you. You do not need to remember the formulas.
Where Is a Pressure Converter Used?
A pressure converter can help in many situations.
Car and Bicycle Tires
Tire pressure may be shown in PSI, bar, or kPa.
If your tire guide uses a different unit from your pressure gauge, you can convert the value.
Always follow the pressure recommended by the vehicle or tire manufacturer.
Weather Reports
Weather stations often measure air pressure in hPa, mbar, or inHg.
A pressure converter helps you compare weather information from different countries.
Engineering and Industry
Machines, hydraulic systems, and compressors may use bar, MPa, or psi.
Workers can use a pressure converter to understand technical values and compare equipment specifications.
Science and School
Students may see pressure measurements in Pa, kPa, atm, or Torr.
The converter helps them solve exercises and understand the relationship between units.
Water and Air Systems
Pumps, pipes, and air systems use pressure measurements to work correctly.
Converting pressure units can make equipment instructions easier to understand.
Why Use Our Online Pressure Converter?
Our pressure converter is designed to make unit conversion simple.
- Easy to use: Enter a number and select the units.
- Fast results: Convert pressure in seconds.
- Many units: Change between Pa, kPa, MPa, bar, psi, atm, Torr, and more.
- Useful for everyday tasks: Check pressure values for tires, weather, school, and equipment.
- No manual math: The converter calculates the result for you.
Whether you are a student, driver, technician, or simply need to change a pressure measurement, this tool can help.
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Table of Contents
Frequently Asked Questions (FAQ)
What is a pressure converter?
A pressure converter is a tool that changes a pressure value from one unit to another. For example, it can convert PSI to bar or kPa to PSI.
How do I convert PSI to bar?
Multiply the PSI value by 0.0689476.
For example, 30 PSI is approximately 2.068 bar.
You can also enter the value into our online pressure converter to get the result.
How many PSI are in 1 bar?
One bar is approximately equal to 14.5038 PSI.
How many pascals are in 1 bar?
One bar is equal to exactly 100,000 pascals.
What is the difference between bar and PSI?
Bar and PSI are two different units used to measure pressure.
Bar is commonly used in many countries, while PSI is widely used in the United States.
One bar is approximately equal to 14.5038 PSI.
What is the difference between atm and bar?
Both units measure pressure, but their values are different.
One standard atmosphere is 101,325 Pa, while one bar is 100,000 Pa.
Therefore, 1 atm is equal to 1.01325 bar.
What is the difference between atm and technical atmosphere (at)?
A standard atmosphere (atm) is equal to 101,325 Pa.
A technical atmosphere (at) is equal to 98,066.5 Pa.
They are similar but not equal.
What is mmHg used for?
Millimeters of mercury (mmHg) is used in medical blood pressure readings and scientific measurements.
One standard atmosphere is equal to 760 mmHg.
What is the difference between Torr and mmHg?
Torr and mmHg have almost the same value in common use.
One Torr is defined as 1/760 of a standard atmosphere. One conventional millimeter of mercury is also very close to this value.
For most everyday conversions, their difference is very small.
Is this pressure converter free?
Yes. You can use the online pressure converter to change pressure units without doing the calculations by hand.
Convert Pressure Units Online
Pressure measurements can look different depending on the unit used. A value in PSI may look very different from the same pressure in bar or pascals.
Our Pressure Converter makes it easy to understand these values.
Convert Pa, kPa, MPa, bar, mbar, atm, at, PSI, Torr, mmHg, inHg, and kgf/cm² in one place.
Enter your value, select the units, and get your pressure conversion quickly and easily.
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