Millibars to bar converter

Convert millibars (mbar) to bar.

Pressure converter

Instant conversion

Edit either value. Decimals and scientific notation supported.

From value

mbar

From unit

To value

bar

To unit

CONVERSION

1 mbar ≈ 0.001 bar

Display precision

Precision changes displayed rounding, not calculation accuracy.

FORMULAbar = mbar ÷ 1000

FORMULA & EXAMPLES

How to convert Millibars to bar

bar = mbar ÷ 1000

Divide the mbar reading by 1000.

Worked examples

1 mbar ≈ 0.001 bar

1 ÷ 1000 ≈ 0.001

1000 mbar ≈ 1 bar

1000 ÷ 1000 ≈ 1

Frequently asked questions

Does mbar to bar change gauge pressure into absolute pressure?

No. Unit conversion preserves the original pressure reference. Converting a gauge reading to absolute pressure additionally requires the applicable atmospheric pressure.

Millibars to bar table

Fixed reference · Millibar to Bar

Reference values use this page’s named pair and default context. Calculator precision and font settings do not change this table.

Millibar (mbar)	Bar (bar)
0	0
0.1	0.0001
0.5	0.0005
1	0.001
2	0.002
5	0.005
10	0.01
25	0.025
50	0.05
100	0.1
1000	1

Table results use 10 significant figures; decimal formula coefficients use up to 15. Calculations use the unit definitions before rounding. Extra digits do not improve measurement accuracy.