Pounds per Square Inch to Millibars Converter

Enter the pressure in pounds per square inch below to get the value converted to millibars.

Result in Millibars:

1 psi = 68.9475 mbar

Do you want to convert millibars to pounds per square inch?

How to Convert Pounds per Square Inch to Millibars

To convert a measurement in pounds per square inch to a measurement in millibars, multiply the pressure by the following conversion ratio: 68.9475 millibars/pound per square inch.

Since one pound per square inch is equal to 68.9475 millibars, you can use this simple formula to convert:

millibars = pounds per square inch × 68.9475

The pressure in millibars is equal to the pressure in pounds per square inch multiplied by 68.9475.

For example, here's how to convert 5 pounds per square inch to millibars using the formula above.
millibars = (5 psi × 68.9475) = 344.7375 mbar

Pounds per square inch and millibars are both units used to measure pressure. Keep reading to learn more about each unit of measure.

What Are Pounds per Square Inch?

One pound per square inch is the pressure of equal to one pound-force per square inch.

The pound per square inch is a US customary and imperial unit of pressure. A pound per square inch is sometimes also referred to as a pound-force per square inch. Pounds per square inch can be abbreviated as psi; for example, 1 pound per square inch can be written as 1 psi.

PSI can be expressed using the formula:
1 psi = 1 lbf / in2

Pressure in pounds per square inch are equal to the pound-force divided by the area in square inches.

What Is a Millibar?

One millibar is equal to one-thousandth of a bar, which is defined as the pressure of one newton per square meter. One millibar is also equal to one hectopascal.

The millibar is a non-SI metric unit for pressure. In the metric system, "milli" is the prefix for thousandths, or 10-3. Millibars can be abbreviated as mbar; for example, 1 millibar can be written as 1 mbar.

Pound per Square Inch to Millibar Conversion Table

Table showing various pound per square inch measurements converted to millibars.
Pounds Per Square Inch Millibars
1 psi 68.95 mbar
2 psi 137.9 mbar
3 psi 206.84 mbar
4 psi 275.79 mbar
5 psi 344.74 mbar
6 psi 413.69 mbar
7 psi 482.63 mbar
8 psi 551.58 mbar
9 psi 620.53 mbar
10 psi 689.48 mbar
11 psi 758.42 mbar
12 psi 827.37 mbar
13 psi 896.32 mbar
14 psi 965.27 mbar
15 psi 1,034 mbar
16 psi 1,103 mbar
17 psi 1,172 mbar
18 psi 1,241 mbar
19 psi 1,310 mbar
20 psi 1,379 mbar
21 psi 1,448 mbar
22 psi 1,517 mbar
23 psi 1,586 mbar
24 psi 1,655 mbar
25 psi 1,724 mbar
26 psi 1,793 mbar
27 psi 1,862 mbar
28 psi 1,931 mbar
29 psi 1,999 mbar
30 psi 2,068 mbar
31 psi 2,137 mbar
32 psi 2,206 mbar
33 psi 2,275 mbar
34 psi 2,344 mbar
35 psi 2,413 mbar
36 psi 2,482 mbar
37 psi 2,551 mbar
38 psi 2,620 mbar
39 psi 2,689 mbar
40 psi 2,758 mbar