How to Convert Pascals to Millimetres of mercury (Pa to mmHg)
Pressure conversions are used for tyre pressure (psi or bar), blood pressure readings in mmHg and weather maps in millibars. This guide shows how to convert pascals into millimetres of mercury by hand, with examples and a quick-reference table.
The conversion
To convert pascals to millimetres of mercury, multiply the value by 0.0075006376. To go the other way, divide by the same number (or multiply by 133.322). For a quick estimate, multiply by about 0.0075.
Millimetres of mercury = pascals × 0.0075006376
Worked examples
- 3 Pa = 0.022502 mmHg
- 12.5 Pa = 0.093758 mmHg
- 75 Pa = 0.562548 mmHg
Pascals to Millimetres of mercury table
| Pascals | Millimetres of mercury |
|---|---|
| 1 Pa | 0.007501 mmHg |
| 2 Pa | 0.015001 mmHg |
| 5 Pa | 0.037503 mmHg |
| 10 Pa | 0.075006 mmHg |
| 20 Pa | 0.150013 mmHg |
| 25 Pa | 0.187516 mmHg |
| 50 Pa | 0.375032 mmHg |
| 100 Pa | 0.750064 mmHg |
| 250 Pa | 1.8752 mmHg |
| 500 Pa | 3.7503 mmHg |
| 1,000 Pa | 7.5006 mmHg |
Common questions
Is Pa to mmHg exact?
The factors used here are the internationally defined values where they exist; results are rounded for display only.
How do I convert back?
Use the Millimetres of mercury to Pascals converter.
Mistakes to avoid
Dropping the units
A bare number without a unit is easy to misread later. Always write the unit with the result.
Multiplying when you should divide
Converting to a smaller unit gives a bigger number, and converting to a larger unit gives a smaller one. If your answer moves the wrong way, you have inverted the factor.
Mixing similar-sounding units
US and imperial gallons, pints and tons are different sizes, and decimal kilobytes differ from binary kibibytes.
Background
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.
Singapore adopted the metric system in the 1970s, replacing imperial units and traditional Chinese measures in most official uses. Metric units are now standard in schools, trade and government, but older units survive in property, markets and imported goods.
Many conversion factors are exact by definition. The inch has been defined as exactly 2.54 centimetres since 1959, and the pound as exactly 0.45359237 kilograms, so conversions involving them can be as precise as you need.
For any value, use the Pascals to Millimetres of mercury Converter or browse all pressure converters.
Run your own numbers: Pascals to Millimetres of mercury Converter