Kpa

SI Pressure Metrology & ISO 80000-4 Standards

The Kilopascal (kPa) is the metric unit of pressure equal to 1,000 Pascals (1,000 Newtons per square meter). Standard Earth sea level atmospheric pressure is legally defined as exactly 101.325 kPa.

Primary Pressure Scale Equivalents

• 1 Kilopascal (kPa): 1,000 Pa = 0.01 bar = 0.145038 psi = 7.50062 mmHg = 0.2953 inHg

• 100 kPa: 1.00 Bar = 14.5038 psi = 0.9869 atm

• 101.325 kPa (1 atm): 1.000 atm = 14.6959 psi = 760.0 mmHg = 29.9213 inHg

• 200 kPa (Tire Pressure): = 29.01 psi = 2.00 bar

• 1,000 kPa (1 MPa): = 145.04 psi = 10.00 bar

How to Use This Calculator

Enter your Pressure in Kilopascals (kPa) (e.g. 101.325 in kPa). Results update instantly as you type — adjust any value to compare scenarios.

The Formula

Conversion factors used in this calculator:

1 kPa = 1,000 Pa

Worked Example

A vehicle tire inflated to 220 kPa carries 31.91 psi (2.20 bar), while a turbocharged engine generating 150 kPa of absolute manifold pressure operates at 7.06 psi of positive boost over standard atmosphere.

Understanding Your Result

Unit conversions are exact by definition within a given measurement system (e.g., 1 km = exactly 1,000 m). Cross-system conversions (metric to imperial) use defined exchange factors: 1 inch = exactly 2.54 cm; 1 pound = 0.45359237 kg. Round your converted result to match the precision of your original measurement — expressing more decimal places than your input justifies implies false accuracy. For regulatory, legal, or safety-critical applications, verify which measurement system is required by the applicable standard.