How to Convert Kilopascals to Inches of mercury (kPa to inHg)
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 kilopascals into inches of mercury by hand, with examples and a quick-reference table.
The conversion
To convert kilopascals to inches of mercury, multiply the value by 0.2952998016. To go the other way, divide by the same number (or multiply by 3.386389). For a quick estimate, multiply by about 0.3.
Inches of mercury = kilopascals × 0.2952998016
Worked examples
- 3 kPa = 0.885899 inHg
- 12.5 kPa = 3.6912 inHg
- 75 kPa = 22.1475 inHg
Kilopascals to Inches of mercury table
| Kilopascals | Inches of mercury |
|---|---|
| 1 kPa | 0.2953 inHg |
| 2 kPa | 0.5906 inHg |
| 5 kPa | 1.4765 inHg |
| 10 kPa | 2.953 inHg |
| 20 kPa | 5.906 inHg |
| 25 kPa | 7.3825 inHg |
| 50 kPa | 14.765 inHg |
| 100 kPa | 29.53 inHg |
| 250 kPa | 73.825 inHg |
| 500 kPa | 147.6499 inHg |
| 1,000 kPa | 295.2998 inHg |
Common questions
Is kPa to inHg 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 Inches of mercury to Kilopascals converter.
Mistakes to avoid
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.
Forgetting squared and cubed units
Area and volume factors are the length factor squared or cubed, so 1 m² is about 10.76 sq ft, not 3.28.
Background
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.
A conversion table is handy for common values, but a calculator is faster and avoids interpolation errors for anything in between.
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 Kilopascals to Inches of mercury Converter or browse all pressure converters.
Run your own numbers: Kilopascals to Inches of mercury Converter