Unit Conversion
From
To
Absolute / Gauge Pressure
Used only when converting between gauge and absolute pressure.
Converted Result
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Conversion Information
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Conversion Formula
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Quick Petroleum Conversions
Engineering note:
Unit conversions are mathematical conversions only.
Always confirm the applicable standard conditions,
pressure reference, temperature reference and field
convention before using a converted value in a
reservoir, production, drilling or facilities model.
Gauge pressure and absolute pressure are not the same
quantity. PetroTopic therefore uses atmospheric pressure
when converting between psig and psia.
Frequently Asked Questions
How do I convert psi to bar?
Multiply psi by approximately 0.0689476 to obtain bar. For example, 1,000 psi is approximately 68.9476 bar.
How do I convert MMscf/d to MMscm/d?
The converter uses 1 MMscf = 0.028316846592 MMscm. Therefore, 1 MMscf/d is approximately 0.02831685 MMscm/d.
How do I convert mD to Darcy?
1 Darcy = 1,000 mD. Therefore, 1 mD = 0.001 Darcy.
What is the difference between psig and psia?
psig is gauge pressure referenced to atmospheric pressure, while psia is absolute pressure referenced to vacuum. The relationship is: psia = psig + atmospheric pressure.
How is API gravity converted to specific gravity?
The standard relationship used here is: SG = 141.5 / (API + 131.5).