mbar to bar Converter

How to convert millibars to bars

Formulabar = mbar × 0.001

Multiply the value in millibars by 0.001. To go the other way, multiply by 1,000 (or divide by 0.001).

A millibar is smaller than a bar: it takes 1,000 millibars to make one bar.

Worked examples

1 millibar1 mbar × 0.001 = 0.001 bar
5 millibars5 mbar × 0.001 = 0.005 bar
10 millibars10 mbar × 0.001 = 0.01 bar
20 millibars20 mbar × 0.001 = 0.02 bar
100 millibars100 mbar × 0.001 = 0.1 bar

Millibars to bars conversion table

Values are calculated by the conversion engine and rounded to 8 significant figures.

Millibars to bars: 0.1–10 mbar
Millibars (mbar)	Bars (bar)
0.1 mbar	0.0001 bar
0.25 mbar	0.00025 bar
0.5 mbar	0.0005 bar
1 mbar	0.001 bar
2 mbar	0.002 bar
3 mbar	0.003 bar
4 mbar	0.004 bar
5 mbar	0.005 bar
6 mbar	0.006 bar
7 mbar	0.007 bar
8 mbar	0.008 bar
9 mbar	0.009 bar
10 mbar	0.01 bar

Millibars to bars: 12–1,000 mbar
Millibars (mbar)	Bars (bar)
12 mbar	0.012 bar
15 mbar	0.015 bar
20 mbar	0.02 bar
25 mbar	0.025 bar
30 mbar	0.03 bar
40 mbar	0.04 bar
50 mbar	0.05 bar
75 mbar	0.075 bar
100 mbar	0.1 bar
250 mbar	0.25 bar
500 mbar	0.5 bar
1,000 mbar	1 bar

About the units

Millibar (mbar)

The millibar (mbar) is a unit of pressure in the metric system. One millibar equals 100 pascals (Pa).

Bar (bar)

Exactly 100,000 Pa, very close to one atmosphere. Common for tyres, scuba tanks and espresso machines (9 bar).

Frequently asked questions

How many bars are in one millibar?

There are 0.001 bars in one millibar, and this value is exact by definition.

How do I convert millibars to bars?

Multiply the number of millibars by 0.001. For example, 10 mbar × 0.001 = 0.01 bar.

How many millibars are in one bar?

One bar equals 1,000 millibars. That is the reverse factor, 1 ÷ 0.001.

What is 10 millibars in bars?

10 mbar = 0.01 bar.

Is this mbar to bar converter accurate?

Yes. Both units are defined exactly in terms of SI units, so the conversion factor is exact; results are shown to 12 significant figures by default and you can change precision in the converter. Calculations run in your browser using the same tested engine that generated this page.