# Boating Calcs — Calcs and Useful References

> Comprehensive boating calculations, unit conversions, and reference materials for marine use. (iPhone/iPad app by Calculated Industries.)

- Source: https://appshunter.io/ios/app/boating-calcs/id410592998 (this page in markdown: same URL + `.md`)
- Developer: [Calculated Industries](https://appshunter.io/developer/370406449)
- Category: Utilities, Reference
- Price: $1.99
- Rating: 4.80/5 from 27 App Store ratings · 30 written reviews indexed
- Age rating: 4+
- Requires: iOS 9.0 · 17 MB
- Languages: American English
- Released: 2010-12-20
- Data updated: 2026-08-16
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/boating-calcs/id410592998/reviews.md

## What is Boating Calcs?

You asked for more calculators and we've added them.  Boating Calcs has over 120 boating calculations and unit conversions and 120 reference pages.  With Boating Calcs you can quickly and easily solve a variety of boating calculations from your iPhone or iPad.

Not just calculators, but the ability save and open saved calculations and add calculators to a favorites list.  You can also email calculator inputs and results so you can easily share your calculations.  Search functionality enables you to quickly find the calculator you want.

Chapters:
  * Area, Angles & Volume
  * Communications References
  * Unit Conversions
  * Finance Calculations
  * Fuel Calculations
  * Glossary / Acronyms
  * Line Calculations and References
  * Knot References
  * Mechanical & Electrical Calculations
  * Performance Calculations
  * Piloting Calculations
  * Propeller Reference and Calculations
  * Weather & Waves Reference and Calculations

If there's a calculator or reference material you'd like to see added, visit our website and send us an email.

## Key features

- Over 120 boating calculations
- Extensive unit conversions
- 120+ reference pages
- Save and open calculations
- Add calculators to favorites
- Email calculation inputs and results
- Search functionality

## Recent user reviews (10 of 30)

All indexed reviews: https://appshunter.io/ios/app/boating-calcs/id410592998/reviews.md

### 5/5 — Invaluable Boating App

*2023-11-21, version 4.1.2*

Best free Boating app I’ve found.
Great for Students & Trainees.
Top Job on this one ! 👍🏻

### 4/5 — Lots of useful stuff

*2023-04-16, version 4.1.2*

Would be good to add TVMDC calculator

### 5/5 — Key equipment

*2018-05-07, version 4.1.0*

This app is what every boater needs, terrific!

### 3/5 — Good

*2017-07-31, version 4.1.0*

The app is good and gives many useful features. The only negative I'd give is that it is sometimes not easy to go back a page.

### 5/5 — A great reference and calculator.

*2017-06-20, version 4.0*

Just got it. Love it already. Love the leeway calculator.

### 5/5 — Very Handy

*2016-10-27, version 4.0*

Many more tools than advertised!

### 5/5 — Why more info then I thought.

*2016-06-27, version 4.0*

Had it just for a short while now, no crashes. Opens every time and has way, way more info then I ever thought it would have.

### 5/5 — Well Done!

*2015-03-29, version 4.0*

I am a professional seafarer, so I know whereof I speak. I am quite impressed by the information contained in this app. While the information is primarily aimed at boaters, rather than seafarers, and in many cases the definitions and information is new to me, it is very rational and sources are given. Well done, Double Dog!

If I had one recommendation to make. It would be to expand the content to include information for rookie seafarers.

### 3/5 — OK

*2015-03-09, version 3.3*

One significant issue with propeller sizing: it fails to take gear ratio into account so the result is that the recommended propeller size is much larger than necessary.

### 4/5 — Great app!

*2013-11-12, version 3.3*

This was a great app before the newest version, but it is now outstanding! This is the first review I have written for any app, and I have several hundred, many of which I've deleted after not finding them useful or them being the best of a category. This newest version of the app just does so much, and the UI is beautiful and elegant.

## Frequently asked questions about Boating Calcs

### What does Boating Calcs do?

Boating Calcs provides over 120 different boating calculations and unit conversions, along with more than 120 reference pages. It helps users quickly and easily solve a wide range of marine-related problems directly from their iPhone or iPad.

### What kind of calculations and references are included?

The app covers various categories including Area, Angles & Volume, Communications, Unit Conversions, Finance, Fuel, Glossary, Lines, Knots, Mechanical & Electrical, Performance, Piloting, Propeller, and Weather & Waves. This extensive coverage ensures a comprehensive tool for boaters.

### Can I save or share my calculations?

Yes, you can save and open your calculations within the app. Additionally, you have the ability to email both the inputs and results of your calculations, making it easy to share them with others or keep a record.

### Is Boating Calcs free to use?

Based on the provided information, the app is available for free. There are no mentions of in-app purchases or advertisements, suggesting a completely free experience for users.

### What devices is Boating Calcs compatible with?

The app is designed to be used on iPhones and iPads. This means it is compatible with Apple's mobile operating systems, iOS and iPadOS.

## Version history (last 5 releases)

### 4.1.2 — 2021-12-14

Fix to share feature

### 4.1.1 — 2021-10-01

Under the cover revision

### 4.1.0 — 2017-06-28

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

* Updated for compatibility with iOS 10 and above.
* Improved usability and sharing.

### 4.0 — 2015-03-27

* Improved search and navigation
* Cleaner and faster interface
* Support for iPhone 6 and iPhone 6 Plus

### 3.3 — 2013-03-25

* Improved navigation 
* Bug fixes
* Search term highlighting

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## More apps by Calculated Industries

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All apps by Calculated Industries: https://appshunter.io/developer/370406449

## Related topics

[intellicast boating](https://appshunter.io/ios/topics/intellicast-boating)

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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 2026-08-16.*