# Oilfield Calculator Pro

> Oilfield Calculator Pro (iPhone/iPad app by Ahmad Suleiman.)

- Source: https://appshunter.io/ios/app/oilfield-calculator-pro/id1573285689 (this page in markdown: same URL + `.md`)
- Developer: [Ahmad Suleiman](https://appshunter.io/developer/1573285691)
- Category: Utilities, Productivity
- Price: $9.99
- Age rating: 4+
- Requires: iOS 15.0 · 23 MB
- Languages: English
- Released: 2021-06-22
- Data updated: 2026-08-17
- User reviews in markdown: https://appshunter.io/ios/app/oilfield-calculator-pro/id1573285689/reviews.md

## What is Oilfield Calculator Pro?

100+ petroleum engineering calculators for oilfield professionals.

Oilfield Calculator Pro is a comprehensive petroleum engineering toolkit designed for engineers, operators, supervisors, technicians, and students working in the oil and gas industry.

The app provides over 100 engineering calculators covering Well Control, Well Testing, Reservoir Engineering, Production Engineering, Enhanced Oil Recovery (EOR), Tank Volume Calculations, Separator Vessel Calculations, Unit Conversions, and many other field and office applications.

Key Features:

• 100+ petroleum engineering calculators
• Well Control calculations (Hydrostatic Pressure, Formation Pressure, Kill Mud Weight, Pressure Gradient, and more)
• Well Testing calculations and fluid property tools
• Reservoir Engineering calculations including PVT, Material Balance, Relative Permeability, Reservoir Volumes, and Rock Properties
• Production Engineering tools including IPR, Vogel, Fetkovich, Artificial Lift, Pressure Analysis, and Flow Performance calculations
• Tank Volume calculations for multiple tank geometries with engineering drawings
• Separator Vessel calculations including retention time, vessel sizing, and liquid capacity calculations
• Extensive oilfield unit conversions
• Interactive charts and engineering visualizations
• Fast offline operation with no internet connection required
• User-friendly interface optimized for field and office use

Whether you are working in drilling, production, reservoir management, well testing, facilities, or petroleum engineering studies, Oilfield Calculator Pro provides reliable engineering tools to support daily operations and technical evaluations.

Developed by petroleum industry professionals for practical field use.

Version 2.0
Professional Petroleum Engineering Toolkit

## Chart rankings

- #175 in Top Paid · Utilities (US App Store)


## Version history (last 5 releases)

### 3.0 — 2026-07-05

Major update! Added Engineering Assistant, Engineering Handbook, Formula Library, Petroleum Glossary, new production, reservoir, well testing, artificial lift, separator and well control calculators. Added engineering charts and plots, improved navigation, enhanced dark mode, better performance, improved calculation accuracy, and various bug fixes.

### 2.0 — 2026-06-19

Version 2.0

• New app icon
• Improved user interface
• Added new petroleum engineering calculators
• Expanded reservoir engineering tools
• Expanded production engineering tools
• Improved performance and stability
• Bug fixes and calculation improvements

### 1.5 — 2023-05-29

Added the 
1- Oil Formation Volume Factor Correlations
2- Bubble Point Pressure Correlations
3- ESP Design

### 1.4 — 2023-01-26

New calculators has been added:

1. Pressure Gradient 	
2. Annular Velocity	
3. Time To Pump (Tubing)
4. Strokes To Displace (Tubing)
5. Time To Pump (Annulus)	
6. Strokes To Displace (Annulus)
7. Volumes Tubing / Casing

### 1.1 — 2021-11-23

Version 1.1
Added the following calculations:
1-	ESP Design.
2-	Various correlations to calculate Oil Formation Volume Factor (Bo).
3-	Various correlations to calculate Solution GOR (Rs).
4-	Various correlations to calculate Bubble Point Pressure (Pb).

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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 2026-08-17.*