Pressure Converter
Convert between all common pressure units — Pascal, kilopascal, bar, psi, atmosphere and mmHg — instantly and accurately.
Pressure Converter
Pressure — Result
0.001 kPa
1 Pascal = 0.001 Kilopascal
How It Works
Pressure is force per unit area, and it is measured in many units across science, engineering and everyday life. The SI unit is the Pascal (Pa), but you will meet kilopascals and megapascals in engineering, bar and atmospheres in weather and diving, psi (pounds per square inch) in tyres and hydraulics, and millimetres of mercury (mmHg) in medicine and barometry. This converter works by translating every unit through the Pascal: your input is multiplied by its conversion factor to get Pascals, then divided by the target unit’s factor. That base-unit approach keeps the conversions consistent and precise. For reference, one bar equals 100,000 Pa, one standard atmosphere is 101,325 Pa, and one psi is about 6,894.76 Pa. Pick your units, type a value, and the result appears immediately.
Formula
Convert via the SI base unit Pascal (Pa): value in Pa = input × factor; result = Pa ÷ target factor. 1 bar = 100,000 Pa; 1 atm = 101,325 Pa; 1 psi ≈ 6,894.76 Pa.
Frequently Asked Questions
How many psi are in 1 bar?
About 14.5 psi. One bar equals 100,000 Pascals, and one psi is about 6,894.76 Pascals, so 100,000 ÷ 6,894.76 ≈ 14.5 psi.
What is standard atmospheric pressure?
One standard atmosphere (atm) is 101,325 Pascals, which is about 1.013 bar, 14.7 psi, or 760 mmHg. It represents average air pressure at sea level.
Why convert through the Pascal?
Using the SI base unit (Pascal) as a common reference means any unit can convert to any other consistently — input to Pascal, then Pascal to the target — avoiding rounding drift.
What is mmHg used for?
Millimetres of mercury (mmHg) is common in medicine (blood pressure) and barometry. 1 mmHg ≈ 133.32 Pa; a normal blood pressure of 120 mmHg is about 16,000 Pa.
What is the difference between bar and psi?
They are just different units of the same quantity. Bar is metric (1 bar = 100 kPa); psi is imperial (pounds per square inch). 1 bar ≈ 14.5 psi. Tyre pressures are often quoted in both.