bar to mbar Converter

How to convert bars to millibars

Formulambar = bar × 1,000

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

A bar is larger than a millibar: one bar contains 1,000 millibars.

Worked examples

1 bar1 bar × 1,000 = 1,000 mbar
5 bars5 bar × 1,000 = 5,000 mbar
10 bars10 bar × 1,000 = 10,000 mbar
20 bars20 bar × 1,000 = 20,000 mbar
100 bars100 bar × 1,000 = 100,000 mbar

Bars to millibars conversion table

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

Bars to millibars: 0.1–10 bar
Bars (bar)	Millibars (mbar)
0.1 bar	100 mbar
0.25 bar	250 mbar
0.5 bar	500 mbar
1 bar	1,000 mbar
2 bar	2,000 mbar
3 bar	3,000 mbar
4 bar	4,000 mbar
5 bar	5,000 mbar
6 bar	6,000 mbar
7 bar	7,000 mbar
8 bar	8,000 mbar
9 bar	9,000 mbar
10 bar	10,000 mbar

Bars to millibars: 12–1,000 bar
Bars (bar)	Millibars (mbar)
12 bar	12,000 mbar
15 bar	15,000 mbar
20 bar	20,000 mbar
25 bar	25,000 mbar
30 bar	30,000 mbar
40 bar	40,000 mbar
50 bar	50,000 mbar
75 bar	75,000 mbar
100 bar	100,000 mbar
250 bar	250,000 mbar
500 bar	500,000 mbar
1,000 bar	1,000,000 mbar

About the units

Bar (bar)

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

Millibar (mbar)

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

Frequently asked questions

How many millibars are in one bar?

There are 1,000 millibars in one bar, and this value is exact by definition.

How do I convert bars to millibars?

Multiply the number of bars by 1,000. For example, 10 bar × 1,000 = 10,000 mbar.

How many bars are in one millibar?

One millibar equals 0.001 bars. That is the reverse factor, 1 ÷ 1,000.

What is 10 bars in millibars?

10 bar = 10,000 mbar.

Is this bar to mbar 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.