Meter of water column.
Meter of waters to Bars Converter — mH2O to bar
Convert Meter of water (mH2O) to Bar (bar) using the exact conversion factor (1 meter of water = 0.0980665 bar). See the formula, worked examples, conversion table, history, and common uses.
Meter of waters to Bars 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.
A bar is exactly 100,000 pascals.
Result = input x 9806.65 / 100000.
Pressure uses the pascal as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Meter of waters to Bars
Meter of water and Bar 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. Specifically: Meter of water column, and a bar is exactly 100,000 pascals.
Formula
bars = meter of waters × 0.0980665
This factor comes from each unit's defined relationship to the category's base unit: 1 meter of water equals 9806.65 base units, and 1 bar equals 100000 base units, so dividing one by the other gives the direct meter of water-to-bar factor of 0.0980665.
Simple example
1 mH2O × 0.0980665 = 0.0980665 bar
1 meter of water = 0.0980665 bars.
Real-world example
35 mH2O × 0.0980665 = 3.4323275 bar
35 meter of waters = 3.4323275 bars.
Conversion table
| Meter of water (mH2O) | Bar (bar) |
|---|---|
| 1 mH2O | 0.0980665 bar |
| 5 mH2O | 0.4903325 bar |
| 10 mH2O | 0.980665 bar |
| 25 mH2O | 2.4516625 bar |
| 50 mH2O | 4.903325 bar |
| 100 mH2O | 9.80665 bar |
Reverse conversion: Bar to Meter of water
0.0980665 bar × 10.19716213 = 1 mH2O
0.0980665 bars = 1 meter of water.
meter of waters = bars × 10.1971621298
For a page dedicated to this direction, see Bar to Meter of water.
Understanding the Meter of water (mH2O)
Meter of water column.
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.
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 bars are in 1 meter of water?
1 meter of water equals 0.0980665 bars, using the exact defined conversion factor rather than an estimate.
How do I convert meter of water to bar?
Multiply the meter of water value by 0.0980665. The converter above does this instantly to whatever precision you set.
How do I convert bar back to meter of water?
Use the reverse factor: 1 bar equals 10.19716213 meter of waters. You can also use the swap control in the converter above to flip the direction instantly.
What is a meter of water?
Meter of water (mH2O) is a unit of pressure.
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.
Is the meter of water to bar 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.