How many decapascals are in 1 bar?

1 bar equals 10,000 decapascals, using the exact defined conversion factor rather than an estimate.

How do I convert bar to decapascal?

Multiply the bar value by 10000. The converter above does this instantly to whatever precision you set.

How do I convert decapascal back to bar?

Use the reverse factor: 1 decapascal equals 0.0001 bars. You can also use the swap control in the converter above to flip the direction instantly.

What is a decapascal?

Decapascal (daPa) is a unit of pressure.

Is the bar to decapascal conversion exact?

Yes. A bar is defined as exactly 100,000 pascals, close to (but distinct from) one standard atmosphere (101,325 Pa). That fixed definition is what the converter above uses, so any rounding you see is a display choice, not a limitation of the math.

Bars to Decapascals Converter

Q: What is a bar?

Bar (bar) measures pressure. A bar is defined as exactly 100,000 pascals, close to (but distinct from) one standard atmosphere (101,325 Pa). It is classified as a Non-SI metric unit accepted for use with SI.

About Converting Bars to Decapascals

Bar and Decapascal both show up on pressure gauges — psi is standard on US tire and tool specifications, while bar is the everyday pressure unit across most of the rest of the world. Bar is most often used for tire pressure specifications outside the us.

Formula

decapascals = bars × 10000

This factor comes from each unit's defined relationship to the category's base unit: 1 bar equals 100000 base units, and 1 decapascal equals 10 base units, so dividing one by the other gives the direct bar-to-decapascal factor of 10000.

Simple example

1 bar × 10000 = 10,000 daPa

1 bar = 10,000 decapascals.

Real-world example

35 bar × 10000 = 350,000 daPa

35 bars = 350,000 decapascals.

Conversion table

Bar (bar)	Decapascal (daPa)
1 bar	10,000 daPa
5 bar	50,000 daPa
10 bar	100,000 daPa
25 bar	250,000 daPa
50 bar	500,000 daPa
100 bar	1,000,000 daPa

Reverse conversion: Decapascal to Bar

1 daPa × 0.0001 = 0.0001 bar

1 decapascal = 0.0001 bars.

bars = decapascals × 0.0001

For a page dedicated to this direction, see Decapascal to Bar.

Understanding the Bar

Bar (bar) measures pressure. A bar is defined as exactly 100,000 pascals, close to (but distinct from) one standard atmosphere (101,325 Pa). It is classified as a Non-SI metric unit accepted for use with SI.

Where it's used: Widely used in Europe and most of the world for tire pressure, weather, and industrial pressure

Uses of the Bar today

Tire pressure specifications outside the US
Meteorology (weather maps commonly use millibars, hPa)
Industrial and hydraulic pressure ratings in metric-system countries

History of the Bar

The bar was proposed by Norwegian meteorologist Vilhelm Bjerknes around 1906 as a convenient round pressure unit close to atmospheric pressure, derived from the CGS unit system (one bar equals one million dynes per square centimeter).

Though not an SI unit, the bar remains in wide practical use, particularly in meteorology (as the millibar, now more often written as the equivalent hectopascal) and in tire and hydraulic pressure specifications across most of the world.

Historical origin. Bar was not the invention of a single named person; it developed through the process described above.

Understanding the Decapascal (daPa)

Decapascal is 10 pascal units.

Bar — sources

BIPM SI Brochure — Non-SI units accepted for use with SI — Lists the bar among accepted non-SI pressure units.

Bars to Decapascals Converter — bar to daPa

Pressure Converter