# Oil & Gas Calculator : OilCalc — Drilling, production Calcs

> Drilling, production Calcs (iPhone/iPad app by Upasana Deshmukh.)

- Source: https://appshunter.io/ios/app/oil-and-gas-calculator-oilcalc/id6756295889 (this page in markdown: same URL + `.md`)
- Developer: [Upasana Deshmukh](https://appshunter.io/developer/1801502050)
- Category: Utilities
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 16.0 · 4 MB
- Languages: American English
- Released: 2025-12-12
- Data updated: 2026-07-17
- User reviews in markdown: https://appshunter.io/ios/app/oil-and-gas-calculator-oilcalc/id6756295889/reviews.md

## What is Oil & Gas Calculator?

OilCalc delivers the quick-calculator stack oil & gas teams rely on every shift. Jump between Drilling, Production, Reservoir, and Terminal/Trading modules to solve pump output, MASP, GOR, tank strapping, CTL/CPL, OOIP, and more in seconds. Each calculator guides inputs with unit selectors and validation, then returns step-by-step formulas, unit conversions, and context summaries for reports or handovers. Save time on well control checks, production optimization, and custody-transfer paperwork while ensuring consistent math across the field.

Feature Highlights

Drilling suite: pump output, annular velocity, mud-weight adjustments, kick tolerance, MASP, displacement
Production toolkit: API/Density/SG, GOR, water cut, flow conversions, tank volumes, shrinkage factors
Reservoir workflows: OOIP, recovery factor, productivity index, Vogel IPR, decline curve analysis
Trading & terminal: CTL/CPL/CTPL, tank strapping, cargo reconciliation, density-at-15°C
Share-ready outputs with formulas, units, and annotated inputs
Dark, field-friendly UI optimized for iPhone and iPad

https://sites.google.com/view/tlutechoilc/home
https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Weekly Plan | $0.99 | per 7 days |
| Monthly Plan | $1.99 | per month |
| Yearly Plan | $9.99 | per year |



## Version history (last 1 release)

### 1.0 — 2025-12-12

No release notes.

## Apps similar to Oil & Gas Calculator

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| [DrillOut Calcs](https://appshunter.io/ios/app/drillout-calcs/id6754534235) | 5.0 (2) | Free | Utilities |
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| [TallyRig: Well Control Calc](https://appshunter.io/ios/app/tallyrig-well-control-calc/id6758645641) | — | Free | Utilities |

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All apps by Upasana Deshmukh: https://appshunter.io/developer/1801502050

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-17.*