# Calco - Calculator — Alcohol calculator

> Calculate alcohol strength and dilution for spirits. (iPhone/iPad app by Bundesamt fur Zoll und Grenzsicherheit BAZG.)

- Source: https://appshunter.io/ios/app/calco-calculator/id626221142 (this page in markdown: same URL + `.md`)
- Developer: [Bundesamt fur Zoll und Grenzsicherheit BAZG](https://appshunter.io/developer/625269636)
- Category: Reference, Utilities
- Price: Free
- Age rating: 17+
- Requires: iOS 9.0 · 45 MB
- Languages: American English
- Released: 2013-03-31
- Data updated: 2026-06-25
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/calco-calculator/id626221142/reviews.md

## What is Calco?

The Federal Office for Customs and Border Security (FOCS) app enables you to determine the alcohol strength of spirits, as expressed in per cent by volume. You will also need an alcoholometer, which will provide you with the required input information.
With "Calco" you have two functions at your disposal: "Verification" and "Reduction" of spirits.
With the "Verification" function you can calculate in per cent by volume just how much alcohol is contained in the spirit, at the reference temperature of 20°C. 
With the "Reduction" function you can calculate how much water you need to add to a spirit in order to obtain the desired consumption strength.

## Key features

- Determine alcohol strength (% by volume)
- Calculate alcohol verification
- Calculate spirit reduction
- Reference temperature at 20°C
- Input from alcoholometer

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/calco-calculator/id626221142/reviews.md

### 5/5 — Sehr schöner Rechner

*2021-12-05, version 3.8*

Danke vielmals für dieses Programm, ich benutze es jeden Tag. Funktioniert perfekt.

### 1/5 — Fehler

*2020-09-25, version 3.1*

App lädt sich nicht öffnen

## Frequently asked questions about Calco

### What is Calco used for?

Calco is used to determine the alcohol strength of spirits in per cent by volume. It also helps calculate how much water to add to achieve a desired consumption strength.

### Does Calco require an alcoholometer?

Yes, Calco requires an alcoholometer to provide the necessary input information for its calculations. The app itself does not measure alcohol content directly.

### What is the 'Verification' function in Calco?

The 'Verification' function in Calco calculates the exact alcohol content of a spirit in per cent by volume, standardized at a reference temperature of 20°C.

### How does the 'Reduction' function work in Calco?

The 'Reduction' function allows you to calculate the precise amount of water you need to add to a spirit to reach your desired alcohol consumption strength.

### What is the age rating for Calco?

Calco has an age rating of 17+, indicating it is intended for mature users. This is likely due to the nature of the content it deals with, which involves alcohol.

### On which devices can Calco be used?

Calco is available for iPhone, iPad, and iPod devices. It is designed for Apple's mobile operating system.

### When was Calco last updated?

The latest version of Calco was released on January 3, 2022. The app was originally released on March 31, 2013.

### Does Calco have ads?

No, Calco does not contain advertisements. It is a completely ad-free application.

## Version history (last 5 releases)

### 4.3 — 2022-01-03

Bug fixes and renaming EZV to BAZG

### 3.8 — 2020-09-30

Fix that the application crashes.

### 3.1 — 2020-06-10

- Change of the application icon
- Fix calculation issue

### 3.0 — 2020-04-06

- Update new layout
- Better user experience

### 1.4.8 — 2016-05-18

Error in conversion corrected

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## More apps by Bundesamt fur Zoll und Grenzsicherheit BAZG

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All apps by Bundesamt fur Zoll und Grenzsicherheit BAZG: https://appshunter.io/developer/625269636

## Related topics

[alcohol calculator](https://appshunter.io/ios/topics/alcohol-calculator)

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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 2026-06-25.*