Torr to Inches of Water
Convert torr to inches of water instantly. 1 Torr = 0.5352401027 inH2O. Includes the exact factor, a conversion table of common values and the definition of both units.
How to convert torr to inches of water
To convert torr to inches of water, divide by 1.8683203948 (multiply by 0.5352401027). The relationship is fixed, so the same factor works for any quantity — there is nothing to look up and nothing that changes with temperature, location or context.
inH2O = Torr × 0.5352401027
Torr to Inches of Water conversion table
The values people look up most often, rounded for reading. Use the calculator above for anything in between.
| Torr | Inches of Water |
|---|---|
| 1 Torr | 0.53524 inH2O |
| 2 Torr | 1.07048 inH2O |
| 3 Torr | 1.60572 inH2O |
| 5 Torr | 2.676201 inH2O |
| 10 Torr | 5.352401 inH2O |
| 20 Torr | 10.704802 inH2O |
| 25 Torr | 13.381003 inH2O |
| 50 Torr | 26.762005 inH2O |
| 100 Torr | 53.52401 inH2O |
| 500 Torr | 267.620051 inH2O |
| 1,000 Torr | 535.240103 inH2O |
What is a torr?
One 760th of an atmosphere, near-identical to a millimetre of mercury.
What is a inches of water?
A low-pressure unit used for ventilation and gas appliances.
The formula
inH2O = Torr × 0.5352401027
Every result on this page comes from this formula. Nothing is rounded until the final display, so figures match a spreadsheet to the cent.
How to use the Torr to Inches of Water
- Type the number of torr you want to convert.
- Read the result in inches of water straight away — there is no button to press.
- Check the table below for the values that come up most often, or reverse the conversion with the linked inches of water to torr page.
Torr to Inches of Water — frequently asked questions
How many inches of water are in a torr?
One torr equals 0.5352401027 inH2O. inH2O = Torr × 0.5352401027
What is the formula to convert torr to inches of water?
The formula is inH2O = Torr × 0.5352401027. It is an exact definition rather than an approximation, so the conversion never drifts no matter how large the number.
How do I convert inches of water back to torr?
Divide instead of multiplying: one inches of water is 1.8683203948 Torr. The reverse converter is linked in the related tools list.
Is this conversion exact?
Yes. Both units are defined against the same base unit by international agreement, so the factor is exact — any rounding you see is only in the display, which you can widen by entering more decimal places.
Is this torr to inches of water free to use?
Yes. Every calculator on the site is free, needs no sign-up, and runs entirely in your browser, so your figures never leave your device.
What people search for
This page answers each of these searches. They are the exact phrases visitors use to find the torr to inches of water.
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About this calculator
Written and reviewed by The Samsung Calculator editorial team. Every calculator is written against a published formula, reviewed against at least one independent reference implementation, and dated when it changes.
Last reviewed August 19, 2026 · Calculation runs client-side · No data collected · Report an error