Numarly

Pressure Converter (All-in-One)

Convert between Pascal, bar, psi, atm, torr and more instantly

Converted Values

Pascal (Pa): 1.00

Kilopascal (kPa): 0.00

Bar: 0.00

PSI: 0.00

Atmosphere (atm): 0.00

Torr: 0.01

Formula

All conversions are based on Pascal (Pa) as the base unit.

Example: 1 bar = 100,000 Pa

1 atm = 101,325 Pa

What is it?

This pressure converter converts between Pascal (Pa), kilopascal (kPa), bar, PSI, atmosphere (atm), and torr simultaneously — widely used in engineering, physics, and weather analysis.

Formula

  • 1 bar = 100,000 Pa
  • 1 atm = 101,325 Pa
  • 1 psi = 6,894.76 Pa

Formula Explanation

The Pascal is the SI base unit of pressure, defined as one newton of force per square meter. Other units — bar (close to standard atmospheric pressure), PSI (pounds per square inch, common in the US), atmosphere (average sea-level pressure), and torr (based on mercury column height) — each convert to Pascals by a fixed factor.

Example Calculation

A car tire inflated to 32 PSI is roughly 220,632 Pa, or about 2.21 bar.

How to Use

  1. Enter a pressure value.
  2. Select the unit.
  3. View the converted pressure across all supported units instantly.

Benefits

  • Bridges scientific (Pa), automotive (PSI), and meteorological (atm) pressure units.
  • Removes the need to memorize six different conversion factors.
  • Useful for tire pressure, weather, and engineering conversions alike.

Use Cases

  • Converting tire pressure specs between PSI and bar.
  • Understanding barometric pressure readings in different units.
  • Physics and engineering coursework involving pressure calculations.

What Your Result Means

Each figure represents the same physical pressure, expressed in a unit common to its typical field — Pascals and kilopascals in science and engineering, PSI in US automotive contexts, and atm or torr in chemistry and meteorology.

Tips

  • Check your vehicle's manual for the correct tire PSI before inflating.
  • Use bar or kPa for most international pressure specifications.
  • Remember standard atmospheric pressure is defined as exactly 1 atm (101,325 Pa).

Common Mistakes

  • Confusing gauge pressure (relative to atmosphere) with absolute pressure — this converter handles raw values, not the distinction between them.
  • Mixing up bar and PSI, which differ by roughly a factor of 14.5.
  • Using an outdated or region-specific tire pressure figure instead of the vehicle manufacturer's spec.

FAQs

What is a Pascal?

The Pascal (Pa) is the SI unit of pressure, defined as one newton of force per square meter.

How do I convert PSI to bar?

Divide the PSI value by 14.5038 to get the equivalent in bar.

Where is a pressure converter commonly used?

It's used in engineering, meteorology (barometric pressure), tire pressure checks, and industrial process monitoring.

What is standard atmospheric pressure?

Standard atmospheric pressure at sea level is defined as exactly 1 atm, which equals 101,325 Pa or about 14.7 PSI.

What is torr used for?

Torr is commonly used in vacuum technology and some scientific fields, historically based on the height of a mercury column in a barometer.

Why do tire gauges show PSI in some countries and bar in others?

PSI is the standard automotive pressure unit in the US, while most other countries use bar or kPa, reflecting broader metric vs. imperial system preferences.

All conversions are exact based on standard unit definitions.

Last updated: July 25, 2026