Blood Pressure Converter
Convert blood pressure readings between mmHg, kPa, and cmH2O instantly.
Type in any field and the others update automatically.
Type in any field — the others update instantly.
Quick Reference
Normal BP: 120/80 mmHg = 16.0/10.7 kPa = 163.1/108.8 cmH2O
Your data stays in your browser. We do not store, collect, or transmit any information you enter.
Blood pressure is measured in different units worldwide.
Base unit: mmHg (millimeters of mercury)
Conversion factors:
- 1 mmHg = 0.1333 kPa
- 1 mmHg = 1.3595 cmH2O
- 1 kPa = 7.5006 mmHg
- 1 cmH2O = 0.7356 mmHg
Normal blood pressure ranges (systolic/diastolic):
- Normal: 120/80 mmHg = 16.0/10.7 kPa
- Elevated: 120-129/<80 mmHg
- High (Stage 1): 130-139/80-89 mmHg
- High (Stage 2): 140+/90+ mmHg
Most countries use mmHg, but some European countries use kPa.