Pressure Converters
Pick a family to convert between common pressure units using exact base definitions.
Explanation
Pressure conversions in this hub are normalized through pascals (Pa). Exact fixed relationships include 1 kPa = 1,000 Pa, 1 bar = 100,000 Pa, and 1 atm = 101,325 Pa, while PSI and mmHg are derived through fixed constants. For clarity, pressure conversions are grouped into SI, metric engineering, imperial, and cross-system categories.
Frequently Asked Questions
What is the SI unit of pressure?
The SI unit of pressure is the pascal (Pa).
How many pascals are in 1 bar?
Exactly 100,000 pascals.
What is the difference between bar and atm?
Both are pressure units, but they use different fixed values: 1 bar = 100,000 Pa and 1 atm = 101,325 Pa.
What does psi stand for?
PSI stands for pounds per square inch.
Are pressure conversions multiplicative?
Yes. Pressure conversions are purely multiplicative with no additive offsets.
How do I switch direction?
Use the switch button to navigate directly to the mirror page for the reverse conversion.