Blood Pressure Converter
Convert between blood pressure units and understand health implications
Blood Pressure Converter
Additional Metrics:
Average pressure during one cardiac cycle. Normal range: 70-100 mmHg.
Difference between systolic and diastolic. Normal range: 40-60 mmHg.
Medical Insights:
Stage 1 hypertension can often be managed with lifestyle changes, though medication may be recommended for those with cardiovascular disease or diabetes.
Understanding Blood Pressure Units
Blood pressure is a vital sign that measures the force exerted by circulating blood on the walls of blood vessels. It is typically recorded as two numbers:
mmHg (millimeters of mercury)
- Traditional unit for blood pressure
- Represents the height of a mercury column
- Standard in most clinical settings worldwide
- Example: 120/80 mmHg
- Most medical literature uses mmHg
kPa (kilopascals)
- SI unit of pressure
- Used in scientific contexts
- Common in some European countries
- Example: 16.0/10.7 kPa
- 1 mmHg = 0.133322 kPa
Conversion Formulas:
mmHg to kPa:
kPa = mmHg × 0.133322
Example: 120 mmHg = 16.0 kPa
mmHg to cmH₂O:
cmH₂O = mmHg × 1.35951
Example: 120 mmHg = 163 cmH₂O
mmHg to psi:
psi = mmHg × 0.0193368
Example: 120 mmHg = 2.32 psi
Blood Pressure Classification
| Category | Systolic (mmHg) | Diastolic (mmHg) | Action |
|---|---|---|---|
| Low | < 90 | and/or < 60 | Monitor if symptomatic |
| Normal | < 120 | and < 80 | Maintain healthy habits |
| Elevated | 120-129 | and < 80 | Lifestyle changes |
| Stage 1 Hypertension | 130-139 | or 80-89 | Lifestyle + possible medication |
| Stage 2 Hypertension | 140-179 | or 90-119 | Lifestyle + medication |
| Hypertensive Crisis | ≥ 180 | and/or ≥ 120 | Immediate medical attention |
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Blood Pressure Visualization
Category Explanation:
Lifestyle changes and possibly medication, depending on risk factors.
Blood Pressure Categories:
| Category | Systolic (mmHg) | Diastolic (mmHg) |
|---|---|---|
| Low | < 90 | and/or < 60 |
| Normal | < 120 | and < 80 |
| Elevated | 120-129 | and < 80 |
| Hypertension Stage 1 | 130-139 | or 80-89 |
| Hypertension Stage 2 | 140-179 | or 90-119 |
| Hypertensive Crisis | ≥ 180 | and/or ≥ 120 |
BP Unit Conversion Reference:
| Unit | Equivalent to 120/80 mmHg |
|---|---|
| mmHg | 120/80 mmHg |
| kPa | 16.00/10.67 kPa |
| cmH₂O | 163/109 cmH₂O |
| psi | 2.32/1.55 psi |
| atm | 0.1579/0.1053 atm |
| hPa | 160.0/106.7 hPa |
Lifestyle Tips for Healthy BP:
- ✓Regular exercise: 150+ minutes of moderate activity weekly
- ✓Reduce sodium: Aim for under 2,300mg daily
- ✓DASH diet: Rich in fruits, vegetables, whole grains
- ✓Limit alcohol: ≤1 drink daily for women, ≤2 for men
- ✓Maintain weight: BMI between 18.5-24.9
- ✓Manage stress: Meditation, yoga, adequate sleep
- ✓Quit smoking: Avoid all tobacco products
- ✓Regular monitoring: Track BP readings
Accurate BP Measurement Tips:
Special Population Guidelines
Older Adults (65+):
Treatment often begins at 130/80 mmHg, with target often <140/90 mmHg depending on overall health and tolerance.
Diabetes:
Target is typically <130/80 mmHg to reduce risk of cardiovascular events and kidney damage.
Chronic Kidney Disease:
Target is generally <130/80 mmHg, with careful monitoring to protect remaining kidney function.
Pregnancy:
Hypertension defined as >140/90 mmHg. Preeclampsia risk increases with readings >160/110 mmHg.
Mobile tip: Swipe left or right on the unit dropdown to quickly change units, or use the arrow buttons
Medical Disclaimer:
This tool is for educational purposes only and not intended for medical diagnosis or treatment. Always consult a qualified healthcare provider about your blood pressure readings and for medical advice. High or low blood pressure can be a serious medical condition requiring proper medical attention.
About the Blood Pressure Converter
Convert between blood pressure units and understand health implications All conversions run instantly in your browser and nothing you enter is sent to a server.
Common Conversion Formulas
| From | To | Formula |
|---|---|---|
| mmHg | kPa | kPa = mmHg × 0.133322 |
| Mean Arterial Pressure | Systolic (S), Diastolic (D) | MAP = D + (S - D) / 3 |
| Pulse Pressure | Systolic (S), Diastolic (D) | PP = S - D |