New Features in 2017
- New Yeast Assimilable Nitrogen (YAN) Calculator -
The Yeast Assimilable Nitrogen (YAN) Calculator determines the yeast nutrient additions
required to supply the desired YAN level in a must. The total YAN requirement
is calculated based on the nitrogen requirements of the selected yeast strain and
on the initial SG of the must. The required masses of the selected nutrients
are then calculated based on their nitrogen contents. The additions can be
scheduled in stages, with up to three nutrients added in up to four stages.
- New Volume Units -
The units of "Bottles (750 mL)" and "Cases (12 bottles)" have been added
to the volume unit list.
- New Campden Tablet Sulfite Mass Option - The user now has the option of specifying the mass of the sulfites
in their campden tablets
in the Sulfite Caculator.
This is most commonly 440 mg, but 550 mg campden tablets are also common.
New Features in 2016
- FermCalc for Android - A new Android version of FermCalc
is available in the
Google Play and
Amazon app stores.
identical to that of the Android calculator.
- Default Acidity Units - Users can now specify
their preferred default acidity units for the acid titration and acidification/deacidification
calculators. These settings will be remembered the next time FermCalc is launched.
- New High Brix Measurement by Dilution Calculator - This
calculator determines the SG of a high-brix liquid from a SG
measurement on a diluted sample of the liquid. This is useful for determining the SG
of a liquid with an SG that is outside the range of standard hydrometers and refractometers.
- New Dry Matter Calculator - This calcualtor determines the
solids content of a wine from its alcohol content and specific gravity. This is intended
for winemakers who determine the alcohol content of their wines by means such as distillation
or ebulliometery and would like to calculate the solids content.
- New Hackbarth SG Calculator - This calculator utilizes the
Hackbarth model to estimate SG from given values of alcohol content and sugar content.
Its purpose is mainly to test and validate the Hackbarth calculation in FermCalc, but it is also
useful in the preparation of fortified wines and liqueurs.
- New Amelioration Calculator - Amelioration is the dilution of
must with water in order to reduce the acidity or sugar content. The Amelioration
Calculator determines the required additions of water, sugar, and acid to a must to meet
the desired acidity and SG levels given the initial acidity and SG.
- New Potential Alcohol Calculator - The Potential Alcohol
Calculator estimates the alcohol content of a wine that will result from the complete
fermentation of a must with a given initial specific gravity. Nine methods are used
to estimate the potential alcohol content.
New Features in 2015
- Additional System Settings - Users can now specify
their preferred default hydrometer SG units, hydrometer SG reading temperature, and
hydrometer calibration temperature. These settings will be remembered the next time
FermCalc is launched.
- New Fortification Point Option - Users can now override
the calculated wine SG at fortification to model the impact of fortifying a fermenting wine at
an SG value different from the "ideal" fortification point.
- Inverse Stock Solution Make-Up Calculation - This calculation
determines the amount of a substance required to yield a stock solution such that a specific
volume of the solution will result in a specific increase in concentration in a specific
volume of wine.
New Features in 2014
- New Fortification Calculators - Two new fortification
calculators have been added: 1) a post-fermentation fortification calculator that
determines he amounts of fortifier and/or sweetener to add to a given wine to
achieve the desired alcohol and sugar contents, and 2) a fortification point calculator
that determines the point at which to stop an active fermentation to yield
the desired level of residual sugar and the amount of fortifier to add to
yield the desired alcohol level.
- Improved Hydrometer Temperature Corrections - The
hydrometer temperature corrections in the alcohol content calculators now account for
the presence of both ethanol and sucrose.
- New Refractometer Units - The list of refractometer
units in the refractometer and hydrometer alcohol content calculation has been expanded to include Brix, Oechsle, Baumé, and KMW.
- New SG Unit Conversion - SG can now be converted to
g/L sugar on the SG conversions panel and some of the other calculators.
New Features in 2013
- System Settings are Saved - The global Unit System
and Look & Feel settings are saved for both the online and stand-alone versions
of the calculator so you don't have to reset these every time you start the
- Improved Dry Weight/Volume Converter - The dry
measures converter now works both ways. Enter a weight to estimate a volume,
or enter a volume to estimate a weight.
here. It is designed designed for mobile devices
that do not support Java. The functionality and mathematics are identical to
the full Java version.
New Features in 2012
- New Solids Content (True Brix) Calculation - A
new method of calculating true Brix was added to the Alcohol Content by Hydrometer
SG Drop calculation panel.
- New Solids Content (True Brix) Units - All true
Brix results in the Alcohol Content calculations can now be reported as either
% by weight or grams/liter.
- New NaOH Standardization Calculation - A new calculation
panel has been added to the Acidity tab to calculate NaOH Normality from a standardization
titration with KPH.
New Features in 2011
- New Alcohol Content Calculations - Several new
methods of calculating alcohol content have been added to the various Alcohol
Content calculation panels.
- New OIML Calculator - A new calculator for calculating
alcohol content from distillate density using the OIML formula was added to
the Alcohol Content calculations panel.
- Refractive Index Conversions - A new tab was added
to the Conversions panel for converting between different refractometer reading
- Improved Consistency in Specific Gravity and Density
Assumptions - All of the calculations on the Sugar and Alcohol tabs now
assume a reference temperature of 20°C.
- New Specific Gravity and Acidity Units - All of
the specific gravity drop-down lists now include Klosterneuburger Mostwaage
(KMW), and the acidity drop down lists now include mEq/L.
New Features in 2010
- Download Option - FermCalc can now be downloaded
and installed on your computer as a standalone application for offline use.
- Miscellaneous Additive Calculations - A new calculation
panel was added with a dry weight to volume calculator, a stock solution calculator,
and a miscellaneous additions calculator.
- Concentration Unit Conversions - A new tab was
added to the Conversions panel for converting between various units of concentration.
- Concentrate Option - Concentrate was added as
a sweetener option on the Sugar Requirements panel. This works just like the
honey option, but specifies concentrate amounts in volumes instead of weights.
- New Deacidifier Option - Potassium Hydroxide (KOH)
was added as a deacidifier option on the Acid Calculations panel.
New Features in 2009
- Honey Calculations - For the mead makers out there,
honey was added as a sweetener option on the Sugar Requirements panel.
- Titration Calculations - On the Acidity Calculations
panel you can now calculate titratable acidity (TA) from the results of a titration
- SO2 Equilibrium Constant Entry - For those who
want complete control over their sulfite calculations, you can now change the
SO2 equilibrium constant that's used in the calculations on the Sulfite Additions
- Alcohol Content by the Hydrometer & Refractometer Method
- An option to calculate alcohol content from hydrometer and refractometer readings
was added to the Alcohol Content Calculations panel.
- Alcohol Content by the Boiling (Spirit Indication) Method - An
option to calculate alcohol content from hydrometer readings before and after
boiling off the alcohol was added to the Alcohol Content Calculations panel.
- Improved International Number Format Support -
Locales that use commas instead of periods as decimals are now supported.
- Improved Documentation - The online documentation
of the calculations has been expanded and improved.
© 2007-2017 Steve Gross
14 July 2017.