What format should the readings use?

Enter one reading per line as time in hours followed by the value, for example `0 1.060` or `24 5.5`.

Can I mix Brix and SG readings?

Yes. Values greater than 1.5 are interpreted as Brix, while lower values are treated as specific gravity.

What does the tool calculate?

It calculates the density curve, apparent attenuation, projected ABV, and an estimated time to reach the target endpoint.

What happens if I leave the target empty?

The tool uses the default target for the selected starter type.

Is this suitable for commercial fermentation control?

No. It is a local, deterministic tracking tool intended for home fermentation reference.

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Fermentation Starter Brix & Timelapse Tracker

Log Brix / specific-gravity readings over time, plot the decay curve, compute apparent attenuation & projected ABV, and predict the fermentation end-point

Details

What this tool helps you do

For home brewers and kombucha / water-kefir / sourdough enthusiasts. Enter time-stamped Brix or specific-gravity readings; the tool converts Brix↔SG (Beer Maverick formula SG = Brix/(258.6 − (Brix/258.2)×227.1) + 1), plots the density decay curve, computes apparent attenuation AA% = (OG−FG)/(OG−1)×100 and projected ABV ≈ (OG−FG)×131.25. A log-linear least-squares fit on the density decay extrapolates to the target endpoint to predict completion (with an R² confidence note). Pure local, deterministic, no network. For home fermentation only.

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Fermentation Starter Brix & Timelapse Tracker

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Key facts

Overview

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How it works

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Examples

1. Kombucha gravity drop over 5 days

2. Water kefir tracked in Brix

FAQ

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