hectopascal [hPa] to bar [bar] Converter

Quick Reference

1 hectopascal (hPa) = 0.001 bar (bar)

1 bar (bar) = 1000 hectopascal (hPa)

How to Convert hectopascal to bar

1 hPa = 0.001 bar
1 bar = 1000 hPa

To convert hectopascal to bar, divide the value by 1000 (equivalently, multiply by 0.001). To convert bar back to hectopascal, multiply by 1000.

Example: convert 10 hPa to bar:
10 hPa = 10 x 0.001 = 0.01 bar

↔ Convert bar to hectopascal

hectopascal

Definition: The hectopascal (symbol: hPa) is a multiple of the pascal, which is the SI unit of pressure. One hPa is equal to 100 pascals.

History/origin: The hectopascal was introduced as a replacement for the millibar (mbar) in meteorology. The change was intended to promote the use of SI units.

Current use: Hectopascals are primarily used in meteorology for measuring atmospheric pressure. 1 hPa is equivalent to 1 mbar, which was previously the standard unit for atmospheric pressure.

bar

Definition: The bar (symbol: bar) is a metric unit of pressure, but not part of the International System of Units (SI). It is defined as exactly equal to 100,000 Pa (100 kPa), which is slightly less than current average atmospheric pressure on Earth at sea level.

History/origin: The bar was introduced by British meteorologist William Napier Shaw in 1909.

Current use: The bar is used in various fields, including meteorology, diving (for measuring pressure underwater), and industrial applications. It is often used when a unit close to atmospheric pressure is convenient.

hectopascal to bar Conversion Table

hectopascal [hPa]	bar [bar]
1 hPa	0.001 bar
2 hPa	0.002 bar
5 hPa	0.005 bar
10 hPa	0.01 bar
20 hPa	0.02 bar
50 hPa	0.05 bar
100 hPa	0.1 bar
200 hPa	0.2 bar
500 hPa	0.5 bar
1000 hPa	1 bar

Common pairs of Pressure

pascal

pascal to kilopascal pascal to megapascal pascal to hectopascal pascal to bar pascal to torr

kilopascal

kilopascal to pascal kilopascal to megapascal kilopascal to hectopascal kilopascal to bar kilopascal to torr

megapascal

megapascal to pascal megapascal to kilopascal megapascal to hectopascal megapascal to bar megapascal to torr

hectopascal

hectopascal to pascal hectopascal to kilopascal hectopascal to megapascal hectopascal to bar hectopascal to torr

bar

bar to pascal bar to kilopascal bar to megapascal bar to hectopascal bar to torr

torr

torr to pascal torr to kilopascal torr to megapascal torr to hectopascal torr to bar

pound per square inch

pound per square inch to pascal pound per square inch to kilopascal pound per square inch to megapascal pound per square inch to hectopascal pound per square inch to bar

kilopound per square inch

kilopound per square inch to pascal kilopound per square inch to kilopascal kilopound per square inch to megapascal kilopound per square inch to hectopascal kilopound per square inch to bar

hectopascal [hPa] to bar [bar] Converter

To convert hectopascal to bar, enter your value in the hPa field above and the result in bar will appear instantly. You can also use the conversion factor shown in the table on this page to calculate manually. The formula is always the same: multiply your hPa value by the fixed conversion ratio to get the equivalent in bar.

Our hectopascal to bar converter uses standardized conversion factors defined by international scientific and metrological organizations. All calculations are performed with full floating-point precision. You can also choose how many decimal places to display in the result, so you get exactly the level of detail you need.

Yes, absolutely. Simply swap the source and destination units in the converter — select bar as your input unit and hPa as your output unit. The same precision and standardized conversion factor applies in both directions.

Converting between hectopascal and bar comes up regularly in engineering, scientific research, construction, and everyday tasks that involve measurements from different unit systems. Our converter eliminates the risk of manual calculation errors and saves time whenever you need to switch between these two units.

Yes, the hectopascal to bar converter is completely free. No account or registration is required, and there are no usage limits. It works on any device — smartphones, tablets, and desktop computers — directly in your browser.

hectopascal and bar are both units used to measure the same physical quantity, but they belong to different measurement systems or represent different scales. The mathematical relationship between them is fixed and constant, which is what makes accurate conversion possible. Scroll up to see the exact conversion factor, formula, and a reference table for common values.

hectopascal [hPa] to bar [bar] Converter

Quick Reference

1 hectopascal (hPa) = 0.001 bar (bar)

1 bar (bar) = 1000 hectopascal (hPa)

How to Convert hectopascal to bar

1 hPa = 0.001 bar
1 bar = 1000 hPa

To convert hectopascal to bar, divide the value by 1000 (equivalently, multiply by 0.001). To convert bar back to hectopascal, multiply by 1000.

Example: convert 10 hPa to bar:
10 hPa = 10 x 0.001 = 0.01 bar

↔ Convert bar to hectopascal

hectopascal

Definition: The hectopascal (symbol: hPa) is a multiple of the pascal, which is the SI unit of pressure. One hPa is equal to 100 pascals.

History/origin: The hectopascal was introduced as a replacement for the millibar (mbar) in meteorology. The change was intended to promote the use of SI units.

Current use: Hectopascals are primarily used in meteorology for measuring atmospheric pressure. 1 hPa is equivalent to 1 mbar, which was previously the standard unit for atmospheric pressure.