Convert bars to millibars

1 bar=1,000mbar

Use the converter below to change any bars value into millibars instantly — with formula, conversion table, and real-world examples.

You have

Equals

1,000

Conversion formula

Forward

millibars = bars × 1,000

Reverse

bars = millibars × 0.001

Example: 10 bar × 1,000 = 10,000 mbar.

About both units

From

Bar

bar

The bar equals 100,000 pascals — slightly less than one atmosphere (1.01325 bar). It is a convenient unit for everyday pressures: tyre pressures, diving depth, weather fronts. Common in European engineering.

Real-world: Car tyre: 2.0–2.5 bar. SCUBA at 10 m depth: 2 bar absolute. Fire hose: 5–7 bar.

Read full bar reference →

Millibar

mbar

The millibar equals 100 pascals or 1/1000 bar. It is the traditional unit for atmospheric pressure in meteorology (now called hectopascal, hPa, but numerically identical). Sea-level pressure averages 1013 mbar.

Real-world: Sea-level average: 1013 mbar. Deep low-pressure storm: below 980 mbar. Hurricane eye: below 920 mbar.

Read full millibar reference →

Bar to Millibar conversion table

Common bars to millibars values for quick reference.

Bar (bar)	Millibar (mbar)
1 bar	1,000 mbar
5 bar	5,000 mbar
10 bar	10,000 mbar
25 bar	25,000 mbar
50 bar	50,000 mbar
100 bar	100,000 mbar
200 bar	200,000 mbar
500 bar	500,000 mbar
1,000 bar	1,000,000 mbar
5,000 bar	5,000,000 mbar

Tips & common mistakes

Quick tips

1 bar = 100 kPa = 0.987 atm = 14.5 psi.
Almost 1 atm — convenient approximation.
Tyre pressures: 2.0–2.5 bar typical car, 6–10 bar truck.

Avoid these

Assuming 1 bar = 1 atm exactly — 1.3% off.
Mixing bar with psi — need factor of 14.5.
Using bar for high-pressure work — switch to MPa.

Frequently asked questions

How many millibars in a bar?

One bar equals 1,000 millibars.

How do I convert bars to millibars?

Multiply the bar value by 1,000 to get the equivalent in millibars.

What is 100 bars in millibars?

100 bars equals 100,000 millibars.

Is a bar bigger than a millibar?

Yes. 1 bar equals 1,000 millibars, so one bar is larger.

How to convert bars to millibars without a calculator?

Multiply by 1,000 for a quick estimate; use a calculator for precise results.

Related pressure conversions

📊 See full comparison matrix →

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Convert bars to millibars

🧮 Conversion formula