Inches of mercury to Millimetres of mercury Converter
Convert inches of mercury (inHg) to millimetres of mercury (mmHg) instantly. Pressure conversions are used for tyre pressure (psi or bar), blood pressure readings in mmHg and weather maps in millibars.
Result
- Millimetres of mercury
- 25.4001 mmHg
How to use the inches of mercury to millimetres of mercury converter
- Enter the inches of mercury (inHg).
- The results update as you type, or press Calculate.
- Read the millimetres of mercury first, then the supporting figures below it.
Formula
Millimetres of mercury = inches of mercury × 25.4000765065
Worked example
For example, with these inputs:
- Inches of mercury (inHg): 1
the calculator returns:
- Millimetres of mercury: 25.4001 mmHg
Inches of mercury to Millimetres of mercury table
| Inches of mercury | Millimetres of mercury |
|---|---|
| 1 inHg | 25.4001 mmHg |
| 2 inHg | 50.8002 mmHg |
| 5 inHg | 127.0004 mmHg |
| 10 inHg | 254.0008 mmHg |
| 20 inHg | 508.0015 mmHg |
| 25 inHg | 635.0019 mmHg |
| 50 inHg | 1,270 mmHg |
| 100 inHg | 2,540.01 mmHg |
| 250 inHg | 6,350.02 mmHg |
| 500 inHg | 12,700.04 mmHg |
| 1,000 inHg | 25,400.08 mmHg |
About this conversion
Pressure conversions are used for tyre pressure (psi or bar), blood pressure readings in mmHg and weather maps in millibars.
Writing the units next to every number while you work is the simplest way to avoid mistakes. If the units do not cancel to leave the one you want, the calculation is set up wrongly.
Unit conversion is simply multiplication by a fixed ratio. The ratio between two units of the same quantity never changes, so once you know it you can convert any value in either direction.
Frequently asked questions
How many millimetres of mercury are in one inches of mercury?
1 inHg = 25.4001 mmHg.
How do I convert inHg to mmHg?
Millimetres of mercury = inches of mercury × 25.4000765065.