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Pressure Converter

Convert between different pressure units including pascals, bars, atmospheres, PSI, mmHg, and more. Perfect for engineering, physics, chemistry, and everyday applications.

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Common Conversions
Quick access to frequently used conversions
Unit Information

Metric Units

International System of Units (SI) measurements

Pa
metric
Pascal
Base unit of pressure in the SI system
kPa
metric
Kilopascal
Common pressure unit, 1 kPa = 1000 Pa
MPa
metric
Megapascal
High pressure unit, used in engineering
GPa
metric
Gigapascal
Very high pressure unit, used in materials science

Imperial Units

Traditional British and American measurements

psi
imperial
Pounds per Square Inch
Common pressure unit in the United States
ksi
imperial
Kilopounds per Square Inch
High pressure unit, 1 ksi = 1000 psi
psf
imperial
Pounds per Square Foot
Pressure unit in pounds per square foot

Scientific Units

Scientific and technical measurements

atm
scientific
Atmosphere
Standard atmospheric pressure at sea level
bar
scientific
Bar
Metric pressure unit, 1 bar ≈ 0.987 atm
mbar
scientific
Millibar
Common in meteorology, 1 mbar = 0.001 bar
mmHg
scientific
Millimeters of Mercury
Blood pressure measurement unit
Torr
scientific
Torr
Named after Evangelista Torricelli, 1 Torr ≈ 1 mmHg
inHg
scientific
Inches of Mercury
Used in weather reporting and aviation
dyn/cm²
scientific
Dyne per Square Centimeter
CGS unit of pressure
N/m²
scientific
Newton per Square Meter
SI unit of pressure (same as Pascal)
kgf/cm²
scientific
Kilogram-force per Square Centimeter
Metric engineering pressure unit
Preferences

Common Use Cases

  • •Automotive: Convert tire pressure between bar and PSI
  • •Medical: Convert blood pressure from mmHg to kPa
  • •Weather: Convert atmospheric pressure for meteorology
  • •Engineering: Convert industrial pressure readings
  • •Chemistry: Convert laboratory pressure measurements

Popular Conversions

2.1 bar→30.5 psi
1 atm→1.013 bar
100 psi→689.5 kPa
120 mmHg→16.0 kPa

How Our Pressure Converter Works

1️⃣

Enter Pressure Value

Input any pressure value in the "From" field. Our converter accepts decimal numbers and scientific notation.

2️⃣

Select Units

Choose your source unit (e.g., bar) and target unit (e.g., psi) from our comprehensive unit selection.

3️⃣

Get Instant Result

View the converted pressure in real-time. Copy results, explore common conversions, or check conversion history.

Understanding Pressure Units

Metric Units (SI)

Pa (Pascal)
Base unit in the SI system. 1 Pa = 1 N/m²
kPa (Kilopascal)
Common pressure unit, 1 kPa = 1000 Pa

Imperial Units

PSI (Pounds per Square Inch)
Standard pressure unit in the United States.
ksi (Kilopounds per Square Inch)
High pressure unit, 1 ksi = 1000 psi

Atmospheric Units

atm (Atmosphere)
Standard atmospheric pressure at sea level.
bar
Metric pressure unit, 1 bar ≈ 0.987 atm

Medical Units

mmHg (Millimeters of Mercury)
Blood pressure measurement unit.
inHg (Inches of Mercury)
Used in weather reporting and aviation.

Frequently Asked Questions

How accurate is this pressure converter?

Our pressure converter uses precise conversion factors and maintains accuracy up to 8 decimal places. All conversions are based on internationally recognized standards.

Can I convert negative pressures?

Yes, our converter supports negative values for applications like relative pressures, vacuum measurements, or scientific calculations.

What is the highest pressure I can convert?

Our converter can handle pressures from -1 trillion to 1 quadrillion units, covering everything from vacuum pressure to ultra-high pressure physics experiments.

How do I use scientific notation?

Enable "Show scientific notation" in preferences for very large or small values. You can also input values like 1e6 for 1,000,000.