Refracto 17+

Homebrewing Brix Calculator

Michael Schmidt

    • 4.3 • 15 Ratings
    • $1.99



Refracto is a user friendly tool for homebrewers that will help you to convert your refractometer measurements during a fermentation process from °Brix to °Plato and SG. It automatically compensates the alcohol effect during fermentation of your beer.

To use Refracto simply swipe to enter your original refractometer reading (from before fermentation) and the result of a current measurement. Refracto then immediately computes the following values:

- Original gravity in °Plato and SG
- Apparent final gravity in °Plato and SG
- Apparent attenuation
- Alcohol by volume

At any time you can switch between four different modes of computation:

- Standard
- Linear formula according Petr Novotný
- Quadratic formula according Petr Novotný
- Linear formula according Sean Terrill
- Cubic formula according Sean Terrill

Please note:

- In addition to this App you will also need a Refractometer with a Brix-scale.
- The supported input range for refractometer readings is 0 to 50 °Bx.

What’s New

Version 2.0.1

Minor improvements and bug fixes.

Ratings and Reviews

4.3 out of 5
15 Ratings

15 Ratings

Elminster of Knotting Hill ,

Well made and *_TINY_*

At 569 Kbytes, this is a purpose built tool for brewers of all stripes. It also supports multiple algorithms for conversion and the scale values are persistent from one execution to the next (which is GREAT if you are tracking a fermentation). Simple to use and easy to calibrate if you have both a Hydrometer and a Refractometer to plug in the correction factor. The dual theme GUI (light and dark) is a plus as well.

gth711 ,


I have been using this on several batches of home brew & comparing with hydrometer readings.
It is very close to my hydrometer & use a lot less brew to get your ABV. I’m surprised at how well it has compared. I have tried other apps like this that were way off & unless.

erniewjr ,

Easy to use

This app is very easy to use. My only problem with the app is it will not calculate FG below 1.000 for my wines and meads.

App Privacy

The developer, Michael Schmidt, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

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