Convert mbar to psi quickly using the pressure conversion calculator below. Enter the pressure value in millibar and get the equivalent pressure in pounds per square inch instantly.
1 mbar = 0.0145038 psi
The calculator is useful for pressure transmitter specifications, pressure gauges, calibration, process instrumentation, pneumatic systems, HVAC applications, and industrial pressure calculations.
mbar to psi Conversion Calculator
Keep your existing calculator, but make sure it displays:
Input: mbar
Output: psi
Add a visible conversion factor below the calculator:
Conversion factor: 1 mbar = 0.0145038 psi
Reverse conversion: 1 psi = 68.9475729 mbar
Definition: Millibar (mbar)
A millibar (symbol: mbar) is a unit of pressure commonly used in meteorology to describe atmospheric pressure. It is equal to one-thousandth of a bar, which is a metric unit of pressure.
Definition: Pound-force per Square Inch (psi)
A pound-force per square inch (symbol: psi) is a unit of pressure used in the imperial and US customary systems. It represents the pressure resulting from a force of one pound-force applied over an area of one square inch.
mbar to psi Conversion Formula
The standard formula for converting millibar to pounds per square inch is:
psi = mbar × 0.0145038
To convert a pressure value from mbar to psi, multiply the pressure value in millibar by 0.0145038.
How to Convert mbar to psi
Use three short steps.
Step 1: Enter the pressure value
Enter the pressure value expressed in millibar into the calculator.
Step 2: Apply the conversion factor
Multiply the mbar value by 0.0145038.
Step 3: Read the result
The calculated value represents the equivalent pressure in psi.
How to Convert Millibar to Psi: Example Calculation
Suppose you have a pressure of 1000 mbar.
To convert it to psi:
1000×0.0145038=14.5038?psi
So, 1000 mbar is equal to 14.5038 psi.
Quick Reference Conversion Table for Millibar to Psi
| mbar | psi |
| 1 mbar | 0.0145038 psi |
| 5 mbar | 0.072519 psi |
| 10 mbar | 0.145038 psi |
| 20 mbar | 0.290076 psi |
| 25 mbar | 0.362595 psi |
| 50 mbar | 0.725190 psi |
| 100 mbar | 1.450380 psi |
| 200 mbar | 2.900760 psi |
| 250 mbar | 3.625950 psi |
| 500 mbar | 7.251900 psi |
| 750 mbar | 10.877850 psi |
| 1000 mbar | 14.503800 psi |
| 1013.25 mbar | 14.695949 psi |
| 1500 mbar | 21.755700 psi |
| 2000 mbar | 29.007600 psi |
| 3000 mbar | 43.511400 psi |
| 5000 mbar | 72.519000 psi |
| 10000 mbar | 145.038000 psi |
What Is a Millibar?
Millibar is commonly used for measuring relatively low pressure values and atmospheric pressure. In industrial instrumentation, mbar can also appear in pressure transmitter ranges, pressure switches, differential pressure instruments, HVAC systems, pneumatic equipment, and process measurement applications.
One millibar is equal to 100 pascals, while 1000 mbar equals 1 bar.
What Is PSI?
PSI stands for pounds per square inch and is a commonly used pressure unit in industrial, mechanical, pneumatic, hydraulic, and process applications. Pressure gauges, transmitters, compressors, pumps, and equipment datasheets may specify pressure in psi.
1 psi = 68.9475729 mbar
mbar vs psi
| Parameter | mbar | psi |
| Full name | Millibar | Pounds per square inch |
| Type | Pressure unit | Pressure unit |
| SI equivalent | 1 mbar = 100 Pa | 1 psi = 6894.757 Pa |
| Common applications | Low pressure and atmospheric pressure | Industrial and mechanical pressure |
| Conversion to other unit | 1 mbar = 0.0145038 psi | 1 psi = 68.9475729 mbar |
mbar and psi represent the same physical quantity but use different measurement systems. The correct conversion factor should be used whenever pressure values are transferred between engineering documents, instruments, gauges, or calibration equipment.
Standard Atmospheric Pressure in mbar and psi
Standard atmospheric pressure is 1013.25 mbar, which is approximately 14.6959 psi.
Therefore:
1013.25 mbar = 14.6959 psi
This value is commonly used as a reference when discussing atmospheric pressure and pressure measurement.
mbar, bar, Pa and psi Conversion
| Pressure unit | Equivalent |
| 1 mbar | 100 Pa |
| 1 bar | 1000 mbar |
| 1 bar | 100000 Pa |
| 1 psi | 68.9475729 mbar |
| 1 psi | 6894.757 Pa |
| 1 mbar | 0.0145038 psi |
Use of Millibar to Psi Conversion Calculator:
- Engineering Applications: Convert pressures in weather-related applications, HVAC systems, and other fields requiring atmospheric pressure measurements.
- Instrumentation: For converting gauge readings from metric units to imperial units.
This calculator is useful for professionals and engineers who need to convert between these two pressure units, ensuring accuracy in calculations and measurements.
Frequently Asked Questions on mbar to psi
Is 1 bar 15 psi?
1 bar equals approximately 14.5038 psi, which is commonly rounded to 14.5 psi.
It can be considered approximately 15 psi for quick calculations.
What is the difference between psi and mbar?
PSI means pounds per square inch, while mbar means millibar, and both are pressure units.
1 psi equals approximately 68.9476 mbar, while 1 mbar equals 0.0145038 psi.
What is mbar in pressure?
mbar stands for millibar, a metric unit used to measure pressure.
1 mbar equals 100 pascals, and 1000 mbar equals 1 bar.
What is 1000 mbar pressure?
1000 mbar equals 1 bar and approximately 14.5038 psi.
It is a commonly used pressure value close to standard atmospheric pressure.
How do I convert mbar to psi?
Multiply the pressure value in mbar by 0.0145038 to obtain psi.
For example, 1000 mbar × 0.0145038 = 14.5038 psi.
What is 900 mbar?
900 mbar equals 0.9 bar and approximately 13.0534 psi.
It is below standard atmospheric pressure of 1013.25 mbar.
