Kilopascal (kPa) - Unit Information & Conversion

Symbol:kPa
Plural:kilopascals
Category:Pressure

🔄 Quick Convert Kilopascal

What is a Kilopascal?

Kilopascal (kPa) = 1,000 pascals. International standard for tire pressure, weather reporting, engineering. More practical than pascals. 1 kPa = 0.145 PSI. Car tires: 220-240 kPa (32-35 PSI). Sea level: 101.325 kPa.

History of the Kilopascal

Derived from pascal (SI pressure unit, 1971). Kilo prefix makes measurements practical since 1 Pa is very small. Standard worldwide except USA for tire pressure, medical blood pressure equipment, industrial specifications.

Quick Answer

What is a Kilopascal? Kilopascal (kPa) = 1,000 pascals. International standard for tire pressure, blood pressure devices, engineering. 1 kPa = 0.145 PSI = 0.01 bar. Car tires: 220-240 kPa (32-35 PSI). Atmospheric pressure: ~101 kPa. Use our pressure converter for conversions.

Definition

1 kPa = 1,000 Pa = 0.145038 PSI = 0.01 bar = 10 hPa = 10 mbar = 0.00987 atm = 7.5 mmHg

Common Uses

Automotive: Tire pressure (international standard, except USA). Medical: Blood pressure equipment (replac ing mmHg in some regions). Meteorology: Atmospheric pressure (101.325 kPa at sea level). Engineering: Structural loads, material strength, HVAC systems.

Real-World Examples

Tire Pressures

  • Bicycle (road): 600-800 kPa (87-116 PSI)
  • Bicycle (mountain): 200-300 kPa (29-44 PSI)
  • Motorcycle: 200-290 kPa (29-42 PSI)
  • Passenger car: 210-250 kPa (30-36 PSI)
    • Compact: 210-230 kPa (30-33 PSI)
    • Sedan: 220-240 kPa (32-35 PSI)
    • SUV: 230-250 kPa (33-36 PSI)
  • Light truck: 240-280 kPa (35-40 PSI)
  • Heavy truck: 550-900 kPa (80-130 PSI)
  • Aircraft tire: 1,200-1,600 kPa (175-230 PSI)

Blood Pressure

  • Normal: 120/80 mmHg = 16/10.7 kPa
  • Elevated: 120-129/<80 mmHg = 16-17.2/<10.7 kPa
  • Hypertension Stage 1: 130-139/80-89 mmHg = 17.3-18.5/10.7-11.9 kPa
  • Hypertension Stage 2: ≥140/90 mmHg = ≥18.7/12 kPa
  • Hypotension: <90/60 mmHg = <12/8 kPa

Atmospheric Pressure

  • Sea level (standard): 101.325 kPa
  • High pressure system: 102-106 kPa
  • Low pressure system: 97-100 kPa
  • Denver (1,609m): ~83.5 kPa
  • Mount Everest summit: ~33.7 kPa

Industrial & Engineering

  • Vacuum (rough): 1-10 kPa
  • HVAC ductwork: 0.1-2.5 kPa
  • Natural gas pipeline (residential): 1.75-7 kPa
  • Water main pressure: 300-800 kPa (43-116 PSI)
  • Compressed air (industrial): 600-1,000 kPa (87-145 PSI)
  • Hydraulic systems: 7,000-35,000 kPa (1,000-5,000 PSI)

Kilopascal Conversion Formulas

To Pascal:

1 kPa = 1000 Pa
Example: 5 kilopascals = 5000 pascals

To Megapascal:

1 kPa = 0.001 MPa
Example: 5 kilopascals = 0.005 megapascals

To Hectopascal:

1 kPa = 10 hPa
Example: 5 kilopascals = 50 hectopascals

To Bar:

1 kPa = 0.01 bar
Example: 5 kilopascals = 0.05 bars

To Millibar:

1 kPa = 10 mbar
Example: 5 kilopascals = 50 millibars

To Atmosphere:

1 kPa = 0.009869 atm
Example: 5 kilopascals = 0.049346 atmospheres

To Technical Atmosphere:

1 kPa = 0.010197 at
Example: 5 kilopascals = 0.050986 technical atmospheres

To Torr:

1 kPa = 7.500617 Torr
Example: 5 kilopascals = 37.503084 torr

To Millimeter of Mercury:

1 kPa = 7.500617 mmHg
Example: 5 kilopascals = 37.503084 millimeters of mercury

To Inch of Mercury:

1 kPa = 0.2953 inHg
Example: 5 kilopascals = 1.476499 inches of mercury

To Pound per Square Inch:

1 kPa = 0.145038 psi
Example: 5 kilopascals = 0.725189 pounds per square inch

To Kilopound per Square Inch:

1 kPa = 0.000145 ksi
Example: 5 kilopascals = 0.000725 kilopounds per square inch

To Kilogram-force per Square Centimeter:

1 kPa = 0.010197 kgf/cm²
Example: 5 kilopascals = 0.050986 kilograms-force per square centimeter

To Kilogram-force per Square Meter:

1 kPa = 101.971621 kgf/m²
Example: 5 kilopascals = 509.858106 kilograms-force per square meter

To Millimeter of Water Column:

1 kPa = 101.971621 mmH₂O
Example: 5 kilopascals = 509.858106 millimeters of water column

To Inch of Water Column:

1 kPa = 4.014631 inH₂O
Example: 5 kilopascals = 20.073154 inches of water column

Frequently Asked Questions

Formula: PSI = kPa × 0.145038 (or kPa ÷ 6.895) Examples:

  • 100 kPa = 14.5 PSI
  • 200 kPa = 29 PSI (bicycle tire)
  • 220 kPa = 32 PSI (typical car tire)
  • 240 kPa = 35 PSI (SUV tire)
  • 600 kPa = 87 PSI (road bike) kPa to PSI converter →

Convert Kilopascal

Need to convert Kilopascal to other pressure units? Use our conversion tool.