mmHg to mmH2O Converter
Pressure · unit-converter
Convert mmHg 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 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).
About mmH2O
Millimeters of water column (mmH2O) is used for very low differential pressure in instrumentation and ventilation.
How to convert millimeter of mercury (mmhg) to millimeter of water (mmh2o, 4 °c)
1 mmhg equals 13.595098063156392 mmh2o in this tool (via pascal):
1 mmhg = (133.32236842105263 Pa ÷ 9.80665 Pa) mmh2o = 13.595098063156392 mmh2o
Each mmhg carries 133.32236842105263 Pa and each mmh2o 9.80665 Pa, so one mmhg equals 133.32236842105263 ÷ 9.80665 mmh2o.
Let p(mmhg) be pressure in mmHg (mmhg), and p(mmh2o) in mmH2O (mmh2o). Then:
p(mmh2o) = p(mmhg) × (133.32236842105263 / 9.80665)
Equivalently, divide by how many mmhg fit into one mmh2o (Pa per mmh2o divided by Pa per mmhg):
p(mmh2o) = p(mmhg) ÷ 0.07355592400690845
Examples
Example #1: Convert 1 mmhg to mmh2o
1 mmhg = 1 mmhg × (133.32236842105263/9.80665) mmh2o = 13.5950980632 mmh2o
1 mmhg = 1 mmhg ÷ 0.07355592400690845 = 13.5950980632 mmh2o
1 mmhg × (133.32236842105263/9.80665) = 13.595098 mmh2o
Example #2: Convert 10 mmhg to mmh2o
10 mmhg = 10 mmhg × (133.32236842105263/9.80665) mmh2o = 135.950980632 mmh2o
10 mmhg = 10 mmhg ÷ 0.07355592400690845 = 135.950980632 mmh2o
10 mmhg × (133.32236842105263/9.80665) = 135.950981 mmh2o
Summary
To convert mmHg to mmH2O, multiply the value in mmhg by (133.32236842105263 Pa per mmhg) / (9.80665 Pa per mmh2o). Equivalently: value_mmh2o = value_mmhg × (133.32236842105263 / 9.80665). Numerically, 1 mmhg equals 13.595098063156392 mmh2o.
Relationship context
Both mmHg and mmH2O are converted by fixed multiples of the pascal. Multiplying by (Pa per mmhg) ÷ (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
| mmHg (mmhg) | mmH2O (mmh2o) |
|---|---|
| 0.1 | 1.3595098063 |
| 1 | 13.5950980632 |
| 2 | 27.1901961263 |
| 3 | 40.7852941895 |
| 4 | 54.3803922526 |
| 5 | 67.9754903158 |
| 6 | 81.5705883789 |
| 7 | 95.1656864421 |
| 8 | 108.760784505 |
| 9 | 122.355882568 |
| mmHg (mmhg) | mmH2O (mmh2o) |
|---|---|
| 10 | 135.950980632 |
| 20 | 271.901961263 |
| 30 | 407.852941895 |
| 40 | 543.803922526 |
| 50 | 679.754903158 |
| 60 | 815.705883789 |
| 70 | 951.656864421 |
| 80 | 1,087.60784505 |
| 90 | 1,223.55882568 |
| 100 | 1,359.50980632 |