mmHg to kPa Converter

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Convert millimeters of mercury to kilopascals at the rate 1 mmHg ≈ 0.1333 kPa. Reference values: 60 mmHg ≈ 8.0 kPa, 80 mmHg ≈ 10.7 kPa, 120 mmHg ≈ 16.0 kPa, 200 mmHg ≈ 26.7 kPa. Useful when blood-pressure readings or vacuum-system data in mmHg need to be expressed in metric kPa. Informational conversion only — for medical decisions consult a healthcare professional. Browser-local.

Millimeter of mercury (mmHg)
Kilopascal (kPa)

Millimeter of mercury (mmHg) → Kilopascal (kPa)

Quick reference table

Millimeter of mercury (mmHg)Kilopascal (kPa)
60 mmHg7.9993 kPa
80 mmHg10.6658 kPa
100 mmHg13.3322 kPa
120 mmHg15.9987 kPa
140 mmHg18.6651 kPa
160 mmHg21.3316 kPa
180 mmHg23.998 kPa
200 mmHg26.6645 kPa

Glossary

Millimeter of mercury (mmHg)

A millimeter of mercury is the pressure exerted by a 1 mm column of mercury at standard gravity, equal to 133.322 Pa. It is the standard unit for blood pressure (120/80 mmHg) and for vacuum-system pressure in laboratory work. The Torr (named after Torricelli) is essentially the same unit — 1 Torr = 1/760 atm differs from 1 mmHg by less than 0.0001 %.

Kilopascal (kPa)

A kilopascal equals 1,000 pascals. It is the everyday metric pressure unit for tire pressure outside the US (32 psi ≈ 220 kPa), atmospheric pressure (~101 kPa at sea level), HVAC duct pressure and blood-pressure readings reported in metric form (120/80 mmHg ≈ 16.0/10.7 kPa). The standard atmosphere equals 101.325 kPa exactly.

Metric / SI pressure

In the metric system, pressure is reported in pascals (SI base) or its multiples — kilopascal (kPa, 10³ Pa), megapascal (MPa, 10⁶ Pa) — and the related non-SI unit bar (10⁵ Pa). The millibar/hectopascal (mbar = hPa = 100 Pa) is used in meteorology. All metric units relate by exact powers of ten, so conversions between them are simple shifts of decimal point.

Imperial / US pressure

US engineering and automotive primarily report pressure in pounds per square inch (psi). 1 psi ≈ 6,894.76 Pa, defined as one pound-force per square inch. Standard atmospheric pressure is 14.696 psi. The closely related "psi-gauge" (psi-g) measures pressure above atmospheric, while "psi-absolute" (psi-a) measures total pressure including atmospheric.

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