Formula reference
The public library contains 72 calculators with equation-specific units, variables, examples, limitations, source context, and calculation checks.
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
72 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.
Only records with individually written explanatory material are published through the calculator directory, search results, topic collections, and sitemap. Published guidance is revised when a formula, unit basis, citation, limitation, or worked result is corrected.
The PetroCalcHub Editorial Team byline identifies the independent publisher responsible for each guide. It is not a claim of certification or third-party endorsement. Every operational use remains subject to qualified engineering review, the governing source, company procedures, and applicable regulation.