Pressure Converter
The pressure converter covers scientific, weather, tyre, medical and industrial pressure units. Use pascals and kilopascals for SI calculations, bar for compressors and scuba equipment, psi for tyres, atmospheres for depth and physics, and mmHg for blood pressure. The result updates immediately and the reference table gives common real-world pressure levels for comparison.
Pressure Gauge
How to Use
- Type the number you want to convert in the Value field at the top.
- Select the unit you are converting from in the left dropdown.
- Select the unit you want to convert to in the right dropdown.
- Read the live result below; there is no calculate button.
- Use the Swap button to reverse the conversion direction instantly.
Common Pressure References
| Application | Pressure | Unit |
|---|---|---|
| Sea level atmospheric | 101325 | Pa (1 atm) |
| Car tyre (typical) | 32–35 | psi |
| Bicycle tyre | 60–120 | psi |
| Normal blood pressure | 120/80 | mmHg |
| High blood pressure | >140/90 | mmHg |
| Scuba tank (full) | 200 | bar |
| Water pressure at 10m depth | ~2 | atm |
| Pressure cooker | 15 | psi |
FAQ
What is pressure and how is it measured?
Pressure is force applied per unit area. The SI unit is the pascal, equal to one newton per square metre.
What is the correct tyre pressure for a car?
Many passenger cars use around 32 to 35 psi, but the correct value is the one printed on the vehicle placard or manual.
What does blood pressure 120/80 mmHg mean?
It means systolic pressure is 120 mmHg and diastolic pressure is 80 mmHg.
What is the difference between psi and bar?
PSI means pounds per square inch. Bar is a metric pressure unit equal to 100,000 Pa.
What is atmospheric pressure and why does it change with altitude?
Atmospheric pressure is the weight of air above a point. It decreases with altitude because there is less air above you.