Convert pressure between pascals, kilopascals, bar, pounds per square inch (psi) and standard atmospheres. Results update as you type and come with the formula and a table of all units.
Typical uses are car and bike tire pressures (psi in the US, bar or kPa elsewhere), scuba tanks, air compressors, weather reports and physics homework.
How to use the Pressure Converter tool
- Type the number you want to convert in the Value box, for example 32 with psi selected.
- Pick the unit you have in From and the unit you need in To.
- Read the result instantly in large type, with the exact formula used shown underneath.
- Open All pressure units to see the same value in every unit at once, or press ⇄ to swap the direction.
- Use Copy result to paste the converted number into a document, spreadsheet or message.
Why use ToolOrca Pressure Converter
- Five common pressure units
- Exact: 1 bar = 100 kPa, 1 atm = 101,325 Pa
- Great for tire pressures
- All units in one table
- Instant results as you type
- Free and private
How pressure conversion works
The pascal (Pa) is one newton per square meter. One bar is exactly 100,000 Pa (100 kPa), a standard atmosphere is 101,325 Pa, and one psi, the pressure of one pound-force on one square inch, is about 6,894.76 Pa.
Worked example: a tire at 32 psi is 32 × 6,894.76 = 220.632 kPa, or 2.20632 bar.
Frequently asked questions
How many psi is 1 bar?
1 bar is 14.5038 psi.
What is 35 psi in bar?
35 psi is 2.41317 bar (241.317 kPa).
Is 1 bar the same as 1 atmosphere?
Almost. 1 atm is 1.01325 bar, so 1 bar is 0.986923 atm.
Is tire pressure gauge or absolute pressure?
Tire gauges show pressure above the surrounding air (gauge pressure). The converter works the same way for gauge and absolute values; just keep the same type on both sides.