kPa to mmHg Converter
To convert kPa to mmHg, multiply by 7.50062. 100 kPa is 750.062 mmHg, and 101.325 kPa, one standard atmosphere, is 760 mmHg. For a quick estimate, multiply by 7.5.
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How It Works
Use it to read an SI pressure, from a sensor, a standard or a data sheet, against a gauge, monitor or vacuum controller scaled in millimetres of mercury. One kilopascal holds up 7.50062 mm of conventional mercury (13,595.1 kg/m³ under standard gravity).
Blood gases are a common case: UK and northern European laboratories report PaO2 and PaCO2 in kPa, while US and most southern European references use mmHg. A PaO2 of 13.3 kPa is 99.8 mmHg.
Formula
mmHg = kPa × 7.50062
The factor is 1,000 Pa divided by the conventional mmHg, 133.322 Pa. Converting to torr gives the same figure to six significant figures.
Worked Example
A vacuum pump is rated to an ultimate pressure of 2 kPa absolute:
2 × 7.50062 = 15.0012 mmHg
kPa to mmHg Table
| kPa | mmHg | inHg |
|---|---|---|
| 0.1 kPa | 0.750062 mmHg | 0.02953 inHg |
| 0.5 kPa | 3.75031 mmHg | 0.14765 inHg |
| 1 kPa | 7.50062 mmHg | 0.2953 inHg |
| 2 kPa | 15.0012 mmHg | 0.5906 inHg |
| 5 kPa | 37.5031 mmHg | 1.4765 inHg |
| 10 kPa | 75.0062 mmHg | 2.953 inHg |
| 13.3 kPa | 99.7582 mmHg | 3.92749 inHg |
| 16 kPa | 120.01 mmHg | 4.7248 inHg |
| 20 kPa | 150.012 mmHg | 5.906 inHg |
| 50 kPa | 375.031 mmHg | 14.765 inHg |
| 80 kPa | 600.049 mmHg | 23.624 inHg |
| 100 kPa | 750.062 mmHg | 29.53 inHg |
| 101.325 kPa | 760 mmHg | 29.9213 inHg |
| 200 kPa | 1,500.12 mmHg | 59.06 inHg |
Going the other way? Use the mmHg to kPa converter. For atmospheres, use the atm to mmHg converter.
FAQ
Common questions about converting kPa to mmHg.
Frequently Asked Questions
How do I convert kPa to mmHg?
Multiply kPa by 7.50062. For example, 50 kPa × 7.50062 = 375.031 mmHg.
How many mmHg is 1 kPa?
1 kPa is 7.50062 mmHg, or 0.2953 inHg.
What is 100 kPa in mmHg?
100 kPa is 750.062 mmHg, close to but below standard atmospheric pressure of 760 mmHg (101.325 kPa).
How do I convert a blood pressure in kPa to mmHg?
Multiply each figure by 7.50062. A reading of 16/10.7 kPa is 120/80.3 mmHg, recorded as 120/80.
How do I convert kPa to torr?
Multiply by 7.50062, the same factor as for mmHg to six significant figures. The torr is exactly 1/760 of a standard atmosphere, and 101.325 kPa is 760 torr.
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