Formula reference
The library contains 1091 formula records with units, variables, references, and calculator links.
About PetroCalcHub
PetroCalcHub is a free petroleum engineering calculator and formula reference for upstream workflows. It focuses on drilling, reservoir engineering, production engineering, PVT, petrophysics, geomechanics, and hydraulic fracturing calculations.
Free calculators
Calculator pages are available without sign-in, subscriptions, or usage paywalls.
In-depth references
28 calculators currently include separately written usage guidance, assumptions, limitations, common error checks, and source context.
What PetroCalcHub covers
The site stays inside upstream petroleum engineering. It does not cover refining, petrochemicals, commodity trading, downstream plant design, or broad oil-and-gas news unless a calculation directly supports upstream wellsite or production engineering work.
Publisher and editorial responsibility
PetroCalcHub is independently maintained and is responsible for the calculator implementation, original explanatory text, source selection, corrections, and publication decisions on this site. It is not affiliated with, endorsed by, or a substitute for any standards body, textbook publisher, software vendor, operator, or engineering consultancy referenced by a formula.
Calculator records remain available as working tools while written guidance is developed. Only records with individually reviewed explanatory material are promoted through the public directory and topic collections. Published guidance is revised when a formula, unit basis, citation, limitation, or worked result is corrected.