# Cotton Gin Air Calculator

> Industrial air velocity and volume calculator for duct systems. (iPhone/iPad app by MARTIN Mehner.)

- Source: https://appshunter.io/ios/app/cotton-gin-air-calculator/id1161028948 (this page in markdown: same URL + `.md`)
- Developer: [MARTIN Mehner](https://appshunter.io/developer/1155932304)
- Category: Utilities
- Price: Free
- Rating: 5.00/5 from 1 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 10.0 · 13 MB
- Languages: American English
- Released: 2016-10-05
- Data updated: 2026-06-01
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/cotton-gin-air-calculator/id1161028948/reviews.md

## What is Cotton Gin Air Calculator?

The Cotton Gin Air Calculator calculates air velocity and volume using either an average or one center line pitot tube velocity pressure reading in an air duct. Measured units are inches water column for velocity pressure and the diameter in inches for a round air duct. The calculator is useful for many industrial applications, in addition to cotton gins, where standard air conditions of 70° F and 29.92 inches Hg can be assumed.

## Key features

- Air velocity calculation
- Air volume calculation
- Pitot tube velocity pressure input
- Supports inches water column
- Supports round duct diameter in inches
- Assumes standard air conditions

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/cotton-gin-air-calculator/id1161028948/reviews.md

### 5/5 — Just works

*2017-02-15*

The Dwyer app has been broken for awhile, this just works. Keep up the good work Martin.

## Frequently asked questions about Cotton Gin Air Calculator

### What is the Cotton Gin Air Calculator used for?

The Cotton Gin Air Calculator is used to determine air velocity and volume within air ducts. It is particularly useful for industrial settings where precise airflow measurements are necessary.

### What units does the Cotton Gin Air Calculator use?

The calculator measures velocity pressure in inches of water column and the diameter of a round air duct in inches. These units are standard for many industrial airflow calculations.

### Does the Cotton Gin Air Calculator require specific environmental conditions?

The app is designed to work assuming standard air conditions of 70° F and 29.92 inches Hg. This simplifies calculations for many common industrial applications.

### What type of input does the Cotton Gin Air Calculator accept?

It accepts input based on either an average pitot tube velocity pressure reading or a single center line pitot tube velocity pressure reading.

### Is the Cotton Gin Air Calculator available on multiple devices?

Yes, the Cotton Gin Air Calculator is available for iPhone, iPad, and iPod devices, making it accessible to a wide range of users.

### How often is the Cotton Gin Air Calculator updated?

The latest version is 2.1, and it was last updated on May 22, 2020. Users can expect a stable experience with this version.

### What is the age rating for the Cotton Gin Air Calculator?

The Cotton Gin Air Calculator has an age rating of 4+, making it suitable for users of all ages who require its utility functions.

### Does the Cotton Gin Air Calculator have ads?

No, the Cotton Gin Air Calculator does not contain advertisements. Users can perform their calculations without interruption.

## Version history (last 3 releases)

### 2.1 — 2020-05-22

Support for future iOS versions.

### 2.0 — 2017-12-28

This update includes support for rectangular duct calculations.

### 1.1 — 2016-10-05

No release notes.

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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 2026-06-01.*