Bar to mmH2O Converter
Pressure · unit-converter
Convert Bar to mmH2O with a fixed input and output unit, step-by-step formula line, and reference tables. All calculations bridge through pascal with fixed definitions (standard atmosphere = 101,325 Pa; torr and mmHg = atm/760; plus industrial/manometer units like kgf/cm², inHg, inH2O, and mmH2O).
About Bar
The bar is 100,000 Pa. It is convenient for industrial and approximate atmospheric pressures (1 bar ≈ 1 atm).
About mmH2O
Millimeters of water column (mmH2O) is used for very low differential pressure in instrumentation and ventilation.
How to convert bar to millimeter of water (mmh2o, 4 °c)
1 bar equals 10197.162129779283 mmh2o in this tool (via pascal):
1 bar = (100000 Pa ÷ 9.80665 Pa) mmh2o = 10197.162129779283 mmh2o
Each bar carries 100000 Pa and each mmh2o 9.80665 Pa, so one bar equals 100000 ÷ 9.80665 mmh2o.
Let p(bar) be pressure in Bar (bar), and p(mmh2o) in mmH2O (mmh2o). Then:
p(mmh2o) = p(bar) × (100000 / 9.80665)
Equivalently, divide by how many bar fit into one mmh2o (Pa per mmh2o divided by Pa per bar):
p(mmh2o) = p(bar) ÷ 0.0000980665
Examples
Example #1: Convert 1 bar to mmh2o
1 bar = 1 bar × (100000/9.80665) mmh2o = 10197.1621298 mmh2o
1 bar = 1 bar ÷ 0.0000980665 = 10197.1621298 mmh2o
1 bar × (100,000/9.80665) = 10,197.162130 mmh2o
Example #2: Convert 10 bar to mmh2o
10 bar = 10 bar × (100000/9.80665) mmh2o = 101971.621298 mmh2o
10 bar = 10 bar ÷ 0.0000980665 = 101971.621298 mmh2o
10 bar × (100,000/9.80665) = 101,971.621298 mmh2o
Summary
To convert Bar to mmH2O, multiply the value in bar by (100000 Pa per bar) / (9.80665 Pa per mmh2o). Equivalently: value_mmh2o = value_bar × (100000 / 9.80665). Numerically, 1 bar equals 10197.162129779283 mmh2o.
Relationship context
Both Bar and mmH2O are converted by fixed multiples of the pascal. Multiplying by (Pa per bar) ÷ (Pa per mmh2o) gives the same result as passing through pascal, keeping bar, atm, PSI, kPa, hPa, torr, and mmHg consistent on the hub.
Conversion tables
| Bar (bar) | mmH2O (mmh2o) |
|---|---|
| 0.1 | 1,019.71621298 |
| 1 | 10,197.1621298 |
| 2 | 20,394.3242596 |
| 3 | 30,591.4863893 |
| 4 | 40,788.6485191 |
| 5 | 50,985.8106489 |
| 6 | 61,182.9727787 |
| 7 | 71,380.1349085 |
| 8 | 81,577.2970382 |
| 9 | 91,774.459168 |
| Bar (bar) | mmH2O (mmh2o) |
|---|---|
| 10 | 101,971.621298 |
| 20 | 203,943.242596 |
| 30 | 305,914.863893 |
| 40 | 407,886.485191 |
| 50 | 509,858.106489 |
| 60 | 611,829.727787 |
| 70 | 713,801.349085 |
| 80 | 815,772.970382 |
| 90 | 917,744.59168 |
| 100 | 1,019,716.21298 |