Online Tool Store
Pressure Converter
Convert pressure between pascals, kilopascals, bars, PSI, atmospheres, and millimetres of mercury instantly in your browser.
🔒 This tool runs entirely in your browser. Your files are never uploaded to a server.
Example: 1 bar is displayed on first load. Results are rounded to 12 significant digits.
How to convert pressure
- Enter the pressure measurement.
- Select the unit currently attached to the value.
- Read all supported equivalents together, from pascals to PSI and atmospheres.
The conversion formula
Every value is converted through pascals, the SI pressure unit. The calculation is target value = input value × source factor ÷ target factor. For example, 1 PSI × 6,894.757293168 Pa/PSI ÷ 1,000 Pa/kPa ≈ 6.894757 kPa.
FAQ
How many pascals are in one bar?
One bar equals exactly 100,000 pascals, so multiply bars by 100,000 to express the same pressure in pascals.
How many kilopascals are in one PSI?
One pound per square inch is approximately 6.894757 kilopascals.
What is standard atmospheric pressure?
One standard atmosphere is defined as 101,325 pascals, equal to 101.325 kilopascals or approximately 14.696 PSI.
Are PSI and PSIG the same?
PSI describes the unit. PSIG specifically indicates gauge pressure relative to ambient atmospheric pressure, while PSIA indicates absolute pressure relative to a vacuum.
Can this distinguish gauge and absolute pressure?
No automatic offset is applied. The converter changes units for the numeric pressure supplied; make sure all compared measurements use the same reference.
How we compare
| Feature | Online Tool Store | ConvertUnits.com | RapidTables Custom Converter |
|---|---|---|---|
| Common pressure results together | Seven units | Pair-by-pair conversion | Custom formula |
| Gauge/absolute offset | Not applied | Reference guidance | User-defined |
| Account required | No | No | No |
Choose ConvertUnits.com for a wider catalog of specialist units or RapidTables when you need a custom conversion formula. Choose Online Tool Store Pressure Converter to see common engineering and weather-pressure equivalents together.