Mash Calculators
Use these handy javascript calculators to help with mashing calculations! The calculators require the use of Firefox, or Netscape 3.0 or better, or Internet Explorer 3.0 or better.
Note that period (.), not comma (,), is used to separate decimals of a number. If you use a comma the decimals will be ignored.
Note the function of these buttons which you will also find below:
Calculate the volume of water which has a heat capacity equal to that of your mash tun. To do this you need to give input numbers from an experiment carried out beforehand. In the experiment you poured a known volume of hot water with known temperature into your mash tun, let the time go until the temperature stabilized, and finally measured the stabilized temperature. The mash tun equivalent water volume is used in the strike temperature calculator and in the rest calculator.
Calculate the temperature your strike water needs
to be in order to hit the desired mashin temperature.
Calculate the amount of boiling water you need
to raise your mash to the next rest temperature.
Find out if your mash tun is big enough to
hold your grain bill plus the strike water.
Note! This calculator does not take the
space under your false bottom into account!
Find out how much sparge water is needed to give a certain volume of wort after boiling.
These calculators should work as advertised, but use them at your own risk. Please report bugs and suggest improvements to Steen Christensen.
Some of the calculators were modified from Green Bay Rackers, who took the formulae from Ken Schwartz's Calculations for AllGrain Brewers.
Also check out Glenn Tinseth's Javascript hop bitterness and water chemistry calculators.

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