Pressure Converter

Convert between different units of pressure - PSI, bar, pascal, atmosphere, torr, mmHg, and more.

Result: 0.0000

What It Does

A Pressure Converter is a specialized tool for converting between different units of pressure measurement. It converts between metric units like pascals (Pa), kilopascals (kPa), and bar, and imperial units such as PSI (pounds per square inch), atmospheres (atm), torr, and millimeters/inches of mercury (mmHg/inHg). This tool is essential for automotive work (tire pressure), scuba diving (water pressure), weather forecasting (atmospheric pressure), engineering (system pressures), scientific research, and industrial applications. It provides accurate conversions with high precision, supporting both metric (SI) and imperial systems. Perfect for understanding tire pressure specifications, scuba diving depth calculations, weather barometric readings, and any pressure-related measurements.

Key Features:

  • Convert between 9 common pressure units (pascals, kilopascals, bar, millibar, PSI, atmospheres, torr, mmHg, inHg)
  • Real-time conversion as you type - instant results
  • Swap button to quickly reverse conversion direction
  • High precision results with up to 4 decimal places
  • Support for both metric and imperial pressure systems
  • Tire pressure support: PSI for automotive applications
  • Atmospheric pressure: bar, atm, and mercury column units
  • Mobile-responsive design for field measurements

How To Use

Convert pressures instantly between metric and imperial units. Perfect for tire pressure, scuba diving, weather, and engineering applications.

1

Enter the Pressure Value

Type or paste the pressure value you want to convert into the "Value" input field. You can enter whole numbers or decimals (e.g., 100, 32.5, 0.75).

2

Select Source Unit

Choose the unit you're converting FROM using the "From" dropdown. Options include pascals, kilopascals, bar, millibar, PSI, atmospheres, torr, millimeters of mercury, and inches of mercury.

3

Select Target Unit

Choose the unit you want to convert TO using the "To" dropdown. The result updates automatically as you make your selection.

4

View Result

See the converted pressure value displayed prominently in the result box. The conversion happens in real-time as you type or change units.

5

Swap Units (Optional)

Click the swap button (⇄) to instantly reverse the conversion direction, swapping the "From" and "To" units without re-entering the value.

Pro Tips

  • •1 atmosphere (atm) = 101,325 pascals = 14.696 PSI
  • •1 bar = 100,000 pascals = 14.504 PSI
  • •1 PSI = 6,894.76 pascals = 0.0689 bar
  • •Standard atmospheric pressure at sea level is 1 atm or 14.696 PSI
  • •Tire pressure is typically measured in PSI (US) or bar (Europe)
  • •Scuba diving uses bar or PSI for tank pressure

Benefits

Automotive: Convert tire pressure between PSI and bar for different vehicles
Scuba Diving: Convert tank pressure and depth pressure for safety
Weather: Understand barometric pressure readings in different units
Engineering: Convert system pressures for design and testing
Science: Convert experimental pressure measurements
Accuracy: Eliminate manual calculation errors in pressure conversions
Time Saving: Instant conversions save time over manual calculations
Safety: Ensure correct pressure readings for critical applications

Use Cases

Tire Pressure Management

Convert tire pressure specifications between PSI and bar. Vehicle manuals may specify pressure in different units depending on the region.

Convert 32 PSI tire pressure to bar (2.21 bar) for European vehicles

Scuba Diving

Convert tank pressure and depth pressure for diving safety. Scuba tanks are rated in bar or PSI, and divers need to understand both.

Convert 200 bar tank pressure to PSI (2,900.75 PSI) for dive planning

Weather Forecasting

Convert barometric pressure readings between different units. Weather reports use various pressure units depending on the region.

Convert 1013.25 millibars to inches of mercury (29.92 inHg) for weather reports

Engineering and Manufacturing

Convert system pressures for hydraulic systems, pneumatic systems, and pressure vessels. Engineers work with various pressure units.

Convert 5 bar system pressure to PSI (72.52 PSI) for equipment specifications

Scientific Research

Convert experimental pressure measurements between units. Scientists often need to convert between pascals, atmospheres, and other units.

Convert 760 torr to pascals (101,325 Pa) for scientific calculations

Frequently Asked Questions

1 What is PSI and when is it used?
PSI stands for "pounds per square inch" and is a unit of pressure commonly used in the United States. It measures the force (in pounds) applied per square inch of area. PSI is widely used for tire pressure, air compressors, hydraulic systems, and many industrial applications. One PSI equals 6,894.76 pascals or 0.0689 bar.
2 What is the difference between bar and atmosphere?
A bar is a metric unit of pressure equal to 100,000 pascals, approximately equal to atmospheric pressure at sea level. An atmosphere (atm) is defined as exactly 101,325 pascals, which is the standard atmospheric pressure at sea level. So 1 atm = 1.01325 bar. Both are close to standard atmospheric pressure, but bar is slightly smaller. Bar is commonly used in Europe, while atmosphere is used in scientific contexts.
3 Why are there so many pressure units?
Different pressure units developed for different applications and regions. Pascals are the SI unit (scientific standard). PSI is common in the US for practical applications. Bar is popular in Europe. Atmospheres relate to Earth's atmospheric pressure. Torr and mmHg are used in vacuum and medical applications. Each unit has historical or practical reasons for its use. The converter helps bridge these different systems.
4 What is standard atmospheric pressure?
Standard atmospheric pressure at sea level is defined as 1 atmosphere (atm), which equals 101,325 pascals, 14.696 PSI, 1.01325 bar, 760 torr, or 760 mmHg. This is the average pressure exerted by Earth's atmosphere at sea level. Pressure decreases with altitude, so pressure readings are often adjusted to sea level for weather reporting.
5 How do I convert tire pressure from PSI to bar?
To convert PSI to bar, divide by 14.504. For example, 32 PSI ÷ 14.504 = 2.21 bar. To convert bar to PSI, multiply by 14.504. For example, 2.2 bar × 14.504 = 31.91 PSI. Most tire pressure recommendations are between 30-35 PSI (2.1-2.4 bar) for passenger vehicles. Always check your vehicle's manual for the correct pressure.
6 What are torr and mmHg used for?
Torr and millimeters of mercury (mmHg) are essentially the same unit, both based on the height of a mercury column. One torr equals 1 mmHg, which equals 133.322 pascals. These units are commonly used in vacuum technology, medical applications (blood pressure), and barometric pressure measurements. They're named after Evangelista Torricelli, who invented the mercury barometer.

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