# Natural Gas Props Calculator — Physical Properties Calculator

> Natural gas properties calculator for thermodynamic and calorific values. (iPhone/iPad app by Daniel Medeiros.)

- Source: https://appshunter.io/ios/app/natural-gas-props-calculator/id1099217044 (this page in markdown: same URL + `.md`)
- Developer: [Daniel Medeiros](https://appshunter.io/developer/1091004600)
- Category: Productivity, Utilities
- Price: $8.99
- Rating: 3.00/5 from 1 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 60 MB
- Released: 2016-04-06
- Data updated: 2026-07-04
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/natural-gas-props-calculator/id1099217044/reviews.md

## What is Natural Gas Props Calculator?

The Natural Gas Properties app calculates thermodynamic and calorific properties of Natural Gas mixtures.

Calculated Properties:

- Molar Weight
- Specific Gravity
- Compressibility Factor
- Heat Capacity
- Thermal Conductivity
- Dynamic Viscosity
- Mass/Mole/Volumetric Lower/Higher Heating Values
- Wobbe Index
- Motor Octane Number (MON)
- Methane Number (MN)
- Hydrocarbon Dew Point @ P
- Hydrocarbon Dew Point @ 1 atm
- Water Dew Point @ P
- Water Dew Point @ 1 atm
- Water Content in ppmv

Basis:

Compressibility Factor, Density and Dew Points are calculated with the Peng-Robinson Equation of State (PR EOS). Heating Values are calculated according to Brazilian Standard NBR 15213 (Calculation of calorific values, density, relative density and Wobbe index of combustible gases from composition), which is equivalent to the ISO Standard 6976:1995 (Natural gas - calculation of calorific values, density, relative density and Wobbe index from composition).

Input Options:

Input options include mole and mass fractions/percentages, temperature and pressure.
Supported Systems of Units: SI, CGS and Imperial (English).

Output Options:

- Table view
- Shareable text report

Disclaimer:

The data and information within this app has been obtained from a wide variety of literature sources. While reasonable care has been exercised in the collection of data and testing of this software, the author disclaims any warranty, expressed or implied, as to the accuracy or reliability of the data or calculations contained therein. The results of calculations obtained from this app yield approximate results, which will not always be suitable for every application. The software is designed for use by trained professional personnel and is not a substitute for sound professional judgment. It is the sole responsibility of the user to validate the data presented by this app and to determine whether the results of this program are accurate and suitable for any specific purpose. No guarantee of accuracy or fitness for any purpose is expressed or implied. The author and contributors strongly recommends that the data be checked against other sources and/or methods before use and application. The author of the app shall not be held liable for any direct, indirect, consequential or incidental damages incurred through use of the data or calculations.

## Key features

- Thermodynamic property calculation
- Calorific property calculation
- Supports mole/mass fractions
- Multiple unit systems (SI, CGS, Imperial)
- Shareable text reports
- Peng-Robinson Equation of State

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/natural-gas-props-calculator/id1099217044/reviews.md

### 3/5 — It could be a lot better if everything worked

*2023-07-07*

A wonderful app, except you can’t export the data. If you try to send it somewhere (text, email, etc.) it crashes and you’ll have to re-enter everything. If you try the other option of saving the txt file, it gets saved in a location inaccessible without jailbreaking. 

The only options are to copy 3+ screens of data by hand or take 4 photos with your phone and emailing the photos to your desktop. 

My system is an iPad Pro 6th gen running iPadOS 16.5.1. Same problem running on an iPad Pro 10.5 inch with 15.5.1.

The share text feature does work on an iphone12 running 16.5.1

### 3/5 — Compressibility not shown as process pressure ?

*2016-06-23*

1. Would like to see the compressibility factor at operating pressure and temperature instead of at atmospheric pressure. 
2. Consider adding the gas viscosity (in cP) for the process conditions too.

**Developer response:** The requested feature was added in the latest update.

## Frequently asked questions about Natural Gas Props Calculator

### What properties does Natural Gas Props Calculator compute?

Natural Gas Props Calculator computes a wide range of properties including molar weight, specific gravity, compressibility factor, heat capacity, thermal conductivity, dynamic viscosity, heating values, Wobbe Index, Motor Octane Number, Methane Number, and various dew points (hydrocarbon and water).

### How does Natural Gas Props Calculator calculate its results?

Compressibility factor, density, and dew points are calculated using the Peng-Robinson Equation of State (PR EOS). Heating values are calculated according to Brazilian Standard NBR 15213, which is equivalent to ISO Standard 6976:1995.

### What input options are available for Natural Gas Props Calculator?

You can input data using mole and mass fractions/percentages, along with temperature and pressure values. The app supports SI, CGS, and Imperial systems of units for these inputs.

### Can I share the results from Natural Gas Props Calculator?

Yes, the app offers output options including a table view and shareable text reports, allowing you to easily distribute the calculated properties.

### What is the price of Natural Gas Props Calculator?

Natural Gas Props Calculator is a paid application priced at $8.99.

### Is Natural Gas Props Calculator available on Android?

Based on the provided data, Natural Gas Props Calculator is supported on iPhone, iPad, and iPod, suggesting it is primarily an iOS application.

### How often is Natural Gas Props Calculator updated?

The latest version, 1.5.1, was released on October 14, 2021. Previous updates indicate a release history dating back to April 6, 2016.

### What is the age rating for Natural Gas Props Calculator?

Natural Gas Props Calculator has an age rating of 4+, making it suitable for a broad audience.

## Version history (last 5 releases)

### 1.5.1 — 2021-10-14

Fixed dew point calculations

### 1.5 — 2021-10-11

Bug fixes

### 1.4 — 2021-07-16

Updated binary to comply with App Store requirements

### 1.3 — 2018-06-12

This app has been updated by Apple to display the Apple Watch app icon.

Added a new method to calculate Methane Number
Added new number formatting options

### 1.2 — 2016-11-24

Added Carbon Dioxide to the list of supported compounds

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## More apps by Daniel Medeiros

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All apps by Daniel Medeiros: https://appshunter.io/developer/1091004600

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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 2026-07-04.*