Torr to mmH2O Converter
Pressure · unit-converter
Convert Torr 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 Torr
The torr is defined as 1/760 of a standard atmosphere (≈133.32236842105263 Pa). It is widely used in vacuum science alongside pascal.
About mmH2O
Millimeters of water column (mmH2O) is used for very low differential pressure in instrumentation and ventilation.
How to convert torr to millimeter of water (mmh2o, 4 °c)
1 torr equals 13.595098063156392 mmh2o in this tool (via pascal):
1 torr = (133.32236842105263 Pa ÷ 9.80665 Pa) mmh2o = 13.595098063156392 mmh2o
Each torr carries 133.32236842105263 Pa and each mmh2o 9.80665 Pa, so one torr equals 133.32236842105263 ÷ 9.80665 mmh2o.
Let p(torr) be pressure in Torr (torr), and p(mmh2o) in mmH2O (mmh2o). Then:
p(mmh2o) = p(torr) × (133.32236842105263 / 9.80665)
Equivalently, divide by how many torr fit into one mmh2o (Pa per mmh2o divided by Pa per torr):
p(mmh2o) = p(torr) ÷ 0.07355592400690845
Examples
Example #1: Convert 1 torr to mmh2o
1 torr = 1 torr × (133.32236842105263/9.80665) mmh2o = 13.5950980632 mmh2o
1 torr = 1 torr ÷ 0.07355592400690845 = 13.5950980632 mmh2o
1 torr × (133.32236842105263/9.80665) = 13.595098 mmh2o
Example #2: Convert 10 torr to mmh2o
10 torr = 10 torr × (133.32236842105263/9.80665) mmh2o = 135.950980632 mmh2o
10 torr = 10 torr ÷ 0.07355592400690845 = 135.950980632 mmh2o
10 torr × (133.32236842105263/9.80665) = 135.950981 mmh2o
Summary
To convert Torr to mmH2O, multiply the value in torr by (133.32236842105263 Pa per torr) / (9.80665 Pa per mmh2o). Equivalently: value_mmh2o = value_torr × (133.32236842105263 / 9.80665). Numerically, 1 torr equals 13.595098063156392 mmh2o.
Relationship context
Both Torr and mmH2O are converted by fixed multiples of the pascal. Multiplying by (Pa per torr) ÷ (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
| Torr (torr) | 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 |
| Torr (torr) | 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 |