A bar is exactly 100,000 pascals.
Bars to Meter of waters Converter — bar to mH2O
Convert Bar (bar) to Meter of water (mH2O) using the exact conversion factor (1 bar = 10.19716213 meter of water). See the formula, worked examples, conversion table, history, and common uses.
Bars to Meter of waters converter
Converter
Pressure Converter
Convert pascals, bars, PSI, atmospheres, mercury columns, water columns, and engineering pressure units.
Context values
Some unit families need one extra value for a physically accurate result.
Meter of water column.
Result = input x 100000 / 9806.65.
Pressure uses the pascal as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Bars to Meter of waters
Bar and Meter of water 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
meter of waters = bars × 10.1971621298
This factor comes from each unit's defined relationship to the category's base unit: 1 bar equals 100000 base units, and 1 meter of water equals 9806.65 base units, so dividing one by the other gives the direct bar-to-meter of water factor of 10.1971621298.
Simple example
1 bar × 10.19716213 = 10.19716213 mH2O
1 bar = 10.19716213 meter of waters.
Real-world example
35 bar × 10.19716213 = 356.9006745 mH2O
35 bars = 356.9006745 meter of waters.
Conversion table
| Bar (bar) | Meter of water (mH2O) |
|---|---|
| 1 bar | 10.19716213 mH2O |
| 5 bar | 50.98581065 mH2O |
| 10 bar | 101.9716213 mH2O |
| 25 bar | 254.9290532 mH2O |
| 50 bar | 509.8581065 mH2O |
| 100 bar | 1,019.716213 mH2O |
Reverse conversion: Meter of water to Bar
10.19716213 mH2O × 0.0980665 = 1 bar
10.19716213 meter of waters = 1 bars.
bars = meter of waters × 0.0980665
For a page dedicated to this direction, see Meter of water 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 Meter of water (mH2O)
Meter of water column.
Bar — sources
- BIPM SI Brochure — Non-SI units accepted for use with SI — Lists the bar among accepted non-SI pressure units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many meter of waters are in 1 bar?
1 bar equals 10.19716213 meter of waters, using the exact defined conversion factor rather than an estimate.
How do I convert bar to meter of water?
Multiply the bar value by 10.19716213. The converter above does this instantly to whatever precision you set.
How do I convert meter of water back to bar?
Use the reverse factor: 1 meter of water equals 0.0980665 bars. You can also use the swap control in the converter above to flip the direction instantly.
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.
What is a meter of water?
Meter of water (mH2O) is a unit of pressure.
Is the bar to meter of water 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.
Where is the bar still used today?
Widely used in Europe and most of the world for tire pressure, weather, and industrial pressure