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Pressure Unit Conversion Tool

Pressure Conversion

Real-time Conversion (Enter any value to automatically display all units)

Common Pressure References

Item Kilopascal (kPa) Atmospheric Pressure (atm) Pounds per Square Inch (psi)
Standard Atmospheric Pressure (Sea Level) 101.325 1 14.696
Car Tire Pressure (Typical) 220-250 2.2-2.5 32-36
Bicycle Tire Pressure 400-800 4-8 60-120
Soccer Ball Pressure 60-80 0.6-0.8 8.7-11.6
Pressure Cooker 70-100 0.7-1.0 10-15
Diving at 10 Meters Depth ~200 ~2 ~29
Household Natural Gas Pipeline 2-3 0.02-0.03 0.3-0.4
Industrial Steam Boiler 1000-2000 10-20 145-290
Hydraulic System (Medium Pressure) 7000-20000 70-200 1000-3000
Waterjet Cutting Pressure 200000-400000 2000-4000 30000-60000
Blood Pressure (Normal) Systolic ~16 ~0.16 ~2.3
Blood Pressure (Normal) Diastolic ~10.7 ~0.11 ~1.5

Conversion Relationships

Basic Relationships (Based on Pascal)

1 kilopascal (kPa) = 1,000 pascals (Pa)
1 megapascal (MPa) = 1,000,000 pascals (Pa)
1 bar = 100,000 pascals (Pa)
1 millibar (mbar) = 100 pascals (Pa)
1 standard atmosphere (atm) = 101,325 pascals (Pa)
1 pound-force per square inch (psi) ≈ 6,894.76 pascals (Pa)
1 torr (Torr) ≈ 133.322 pascals (Pa)
1 millimeter of mercury (mmHg) ≈ 133.322 pascals (Pa)
1 inch of mercury (inHg) ≈ 3,386.39 pascals (Pa)
1 kilogram-force per square centimeter (kgf/cm²) ≈ 98,066.5 pascals (Pa)
1 meter of water column (mH₂O) ≈ 9,806.65 pascals (Pa)
1 millimeter of water column (mmH₂O) ≈ 9.80665 pascals (Pa)

Common Conversions

1 atmosphere (atm) = 1.01325 bar
1 atmosphere (atm) ≈ 14.696 pounds per square inch (psi)
1 atmosphere (atm) = 760 torr (Torr) = 760 millimeters of mercury (mmHg)
1 bar ≈ 14.504 pounds per square inch (psi)
1 kilogram-force per square centimeter (kgf/cm²) ≈ 0.968 atmosphere (atm)
1 kilogram-force per square centimeter (kgf/cm²) ≈ 14.223 pounds per square inch (psi)

Application Areas

Pascal (Pa), kilopascal (kPa), megapascal (MPa): SI units commonly used in science and engineering
Bar (bar), millibar (mbar): commonly used in meteorology and vacuum technology
Standard atmosphere (atm): standard reference pressure
Pound-force per square inch (psi): commonly used in tires and industrial pressure gauges in the US and UK
Torr (Torr), millimeters of mercury (mmHg): used in medicine (blood pressure) and vacuum technology
Kilogram-force per square centimeter (kgf/cm²): traditional Chinese engineering unit
Meters of water column (mH₂O): used for water pressure and liquid level measurement

Batch conversion (one value per line, format: number unit)

About pressure units:

Pascal (Pa):The standard unit of pressure in the International System of Units (SI). One pascal equals the pressure exerted by a force of one newton acting on an area of one square meter. Because the pascal is a small unit, kilopascal (kPa) or megapascal (MPa) are often used in engineering.

Bar (bar):A pressure unit widely used in meteorology and engineering. One bar is approximately equal to standard atmospheric pressure. Millibar (mbar) is commonly used in weather forecasting.

Standard atmosphere (atm):Defined as the average atmospheric pressure at sea level, equal to 101,325 pascals, and often used as a standard reference pressure.

Pound-force per square inch (psi):Common pressure units used in English-speaking countries, widely applied in automotive tires, hydraulic systems, and other fields.

Torr (T) / Millimeters of mercury (mmHg):Both have equal values and are mainly used in medicine (such as blood pressure measurement) and vacuum technology. 760 Torr equals 1 standard atmosphere.

Kilogram-force per square centimeter (kgf/cm²):A traditional Chinese engineering unit, gradually being replaced by SI units but still used in some old equipment and literature. Approximately equal to 0.968 standard atmospheres.