Bar to PSIG Calculator
Instantly convert pressure from Bar to PSIG (pounds per square inch gauge). Supports mbar, kPa, and MPa inputs with full gauge and absolute pressure breakdowns.
Bar to PSIG Calculator
Convert pressure units instantly and accurately
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Pressure Conversion FAQ
Everything you need to know about converting Bar to PSIG and understanding pressure measurements.
A Bar to PSIG calculator is a tool used to convert pressure measurements from the metric unit ‘Bar’ to the imperial unit ‘PSIG’ (pounds per square inch gauge). It is commonly used in engineering, automotive, and industrial applications to translate pressure readings between metric and imperial systems.
Bar is a metric unit of pressure defined as exactly 100,000 Pascals (100 kPa). PSI (pounds per square inch) is an imperial unit of pressure based on avoirdupois units, representing the force of one pound applied to an area of one square inch. 1 Bar is approximately equal to 14.5038 PSI.
The ‘G’ in PSIG stands for ‘Gauge’. PSIG measures pressure relative to the local atmospheric pressure. A PSIG reading of 0 means the pressure is equal to the surrounding atmospheric pressure. This is in contrast to PSIA (Absolute), which includes atmospheric pressure in its measurement.
To convert Bar to PSIG, you multiply the pressure value in Bar by the conversion factor 14.5037738. For example, to convert 2 Bar to PSIG: 2 × 14.5038 = 29.0076 PSIG. This calculator performs this conversion instantly for any value.
PSIG (Gauge) measures pressure relative to atmospheric pressure, while PSIA (Absolute) measures pressure relative to a perfect vacuum. The relationship between them is: PSIA = PSIG + Atmospheric Pressure. At sea level, standard atmospheric pressure is approximately 14.696 PSI, so PSIA = PSIG + 14.696.
By definition, ‘Bar’ is a unit of absolute pressure (often written as Bar(a) or bara). However, in many industrial and everyday contexts, ‘Bar’ is used colloquially to mean gauge pressure (Barg). When using this calculator, we assume the input is gauge pressure if you are converting to PSIG, but the mathematical conversion factor (1 Bar = 14.5038 PSI) applies equally to both absolute and gauge scales.
Standard atmospheric pressure at sea level is defined as 1 atmosphere (atm). In Bar, this is approximately 1.01325 Bar. In PSI, this is approximately 14.6959 PSI. This is the baseline pressure that is added to gauge readings to get absolute readings.
This calculator uses the exact standard conversion factor of 1 Bar = 14.5037738 PSI and 1 atm = 14.6959 PSI. The results are mathematically precise to several decimal places. For most engineering and industrial applications, this level of accuracy is more than sufficient.