Pressure Converter

How to Use the Pressure Converter

Step-by-Step Guide

1. Enter Pressure Value: Type the pressure measurement you want to convert in the input field
2. Select Source Unit: Choose the unit you're converting FROM (PSI, bar, kPa, or Pa)
3. Select Target Unit: Choose the unit you're converting TO
4. View Result: The conversion result appears instantly in the result card
5. Swap Units: Click "Swap Units" to reverse the conversion direction
6. Try Examples: Click example scenarios for common pressure conversions:
   • Car Tire (32 PSI to bar)
   • Bike Tire (2.5 bar to PSI)
   • Atmospheric (101.325 kPa to bar)
7. Copy Result: Click "Copy Result" to copy the conversion to your clipboard
8. Reset: Click "Reset" to clear all inputs and start fresh

Supported Pressure Units

• PSI (Pounds per Square Inch): Common in the United States for tire pressure and hydraulics
• Bar: Metric unit commonly used in Europe, approximately equal to atmospheric pressure
• Pascal (Pa): The SI unit of pressure, one newton per square meter
• Kilopascal (kPa): 1,000 pascals, commonly used for weather and engineering

Conversion Factors

• 1 Pascal (Pa) = Base SI unit
• 1 Kilopascal (kPa) = 1,000 Pa
• 1 Bar = 100,000 Pa
• 1 PSI ≈ 6,894.76 Pa
• 1 bar ≈ 14.5038 PSI
• 1 PSI ≈ 0.0689 bar
• Atmospheric pressure ≈ 101.325 kPa ≈ 1.01325 bar ≈ 14.7 PSI

Common Pressure Standards

Atmospheric Pressure (at sea level):

• 101,325 Pa
• 101.325 kPa
• 1.01325 bar
• 14.696 PSI

Vacuum:

• 0 Pa (absolute vacuum)
• Pressures below atmospheric are often measured as negative gauge pressure

Gauge vs Absolute Pressure:

• Gauge pressure: Measured relative to atmospheric pressure (PSIG, barg)
• Absolute pressure: Measured relative to perfect vacuum (PSIA, bara)
• This converter handles numeric values; ensure you know which standard you're using

Common Use Cases

Automotive

• Check tire pressure specifications
• Convert between US (PSI) and European (bar) tire ratings
• Monitor turbocharger boost pressure
• Understand brake system pressure

Weather & Aviation

• Convert barometric pressure readings
• Understand weather maps (typically in kPa or millibars)
• Calculate altitude effects on pressure
• Compare weather data from different sources

Industrial & Engineering

• Hydraulic system specifications
• Pneumatic tool requirements
• Pressure vessel ratings
• Compressor output specifications

HVAC & Refrigeration

• Air conditioning system pressure
• Refrigerant pressure-temperature relationships
• Duct pressure measurements
• System diagnostics

Tips for Accurate Conversions

1. Gauge vs Absolute: Ensure you know if measurements are gauge (relative) or absolute pressure
2. Temperature Effects: Pressure varies with temperature (e.g., tire pressure increases when hot)
3. Precision: Results display up to 4 decimal places for accuracy
4. Altitude: Atmospheric pressure decreases with altitude
5. Unit Symbols: PSI vs PSIG vs PSIA; bar vs barg vs bara - know which you need