Pounds per Square Inch to Millibars Conversion (psi to mbar)

Pounds per Square Inch to Millibars Converter

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

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Result in Millibars:

1 psi = 68.9475 mbar

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.

Learn more about pounds per square inch.

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.

Learn more about millibars.

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

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