mmH2O to mmHg Converter
Pressure · unit-converter
Convert mmH2O to mmHg 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 mmH2O
Millimeters of water column (mmH2O) is used for very low differential pressure in instrumentation and ventilation.
About mmHg
Millimeters of mercury (mmHg) is common in medicine (e.g. blood pressure). Here it uses the same Pa per unit as torr (133.32236842105263 Pa).
How to convert millimeter of water (mmh2o, 4 °c) to millimeter of mercury (mmhg)
1 mmh2o equals 0.07355592400690845 mmhg in this tool (via pascal):
1 mmh2o = (9.80665 Pa ÷ 133.32236842105263 Pa) mmhg = 0.07355592400690845 mmhg
Each mmh2o carries 9.80665 Pa and each mmhg 133.32236842105263 Pa, so one mmh2o equals 9.80665 ÷ 133.32236842105263 mmhg.
Let p(mmh2o) be pressure in mmH2O (mmh2o), and p(mmhg) in mmHg (mmhg). Then:
p(mmhg) = p(mmh2o) × (9.80665 / 133.32236842105263)
Equivalently, divide by how many mmh2o fit into one mmhg (Pa per mmhg divided by Pa per mmh2o):
p(mmhg) = p(mmh2o) ÷ 13.595098063156392
Examples
Example #1: Convert 1 mmh2o to mmhg
1 mmh2o = 1 mmh2o × (9.80665/133.32236842105263) mmhg = 0.073555924 mmhg
1 mmh2o = 1 mmh2o ÷ 13.595098063156392 = 0.073555924 mmhg
1 mmh2o × (9.80665/133.32236842105263) = 0.073556 mmhg
Example #2: Convert 10 mmh2o to mmhg
10 mmh2o = 10 mmh2o × (9.80665/133.32236842105263) mmhg = 0.7355592401 mmhg
10 mmh2o = 10 mmh2o ÷ 13.595098063156392 = 0.7355592401 mmhg
10 mmh2o × (9.80665/133.32236842105263) = 0.735559 mmhg
Summary
To convert mmH2O to mmHg, multiply the value in mmh2o by (9.80665 Pa per mmh2o) / (133.32236842105263 Pa per mmhg). Equivalently: value_mmhg = value_mmh2o × (9.80665 / 133.32236842105263). Numerically, 1 mmh2o equals 0.07355592400690845 mmhg.
Relationship context
Both mmH2O and mmHg are converted by fixed multiples of the pascal. Multiplying by (Pa per mmh2o) ÷ (Pa per mmhg) gives the same result as passing through pascal, keeping bar, atm, PSI, kPa, hPa, torr, and mmHg consistent on the hub.
Conversion tables
| mmH2O (mmh2o) | mmHg (mmhg) |
|---|---|
| 0.1 | 0.0073555924 |
| 1 | 0.073555924 |
| 2 | 0.147111848 |
| 3 | 0.220667772 |
| 4 | 0.294223696 |
| 5 | 0.36777962 |
| 6 | 0.441335544 |
| 7 | 0.514891468 |
| 8 | 0.5884473921 |
| 9 | 0.6620033161 |
| mmH2O (mmh2o) | mmHg (mmhg) |
|---|---|
| 10 | 0.7355592401 |
| 20 | 1.4711184801 |
| 30 | 2.2066777202 |
| 40 | 2.9422369603 |
| 50 | 3.6777962003 |
| 60 | 4.4133554404 |
| 70 | 5.1489146805 |
| 80 | 5.8844739205 |
| 90 | 6.6200331606 |
| 100 | 7.3555924007 |