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# 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:

### Mash Tun Heat Capacity Calculator

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.

 Input Result Temperature of mash tun before adding water (deg F or C) Volume of water added (qt or liters) Temperature of water added (deg F or deg C) Stabilized temperature of water in mash tun (deg F or C) Units of Measurement: American Metric Mash tun equivalent water volume

mash tun equivalent water volume to Strike Temperature Calculator.

### Strike Temperature Calculator

Calculate the temperature your strike water needs to be in order to hit the desired mash-in temperature.

 Input Result Weight of Grains (lb or kg) Mash Thickness (qt/lb or liters/kg) Volume below false bottom (qt or liters) Mash tun equivalent water volume (qt or liters) Temperature of Grain (deg F or C) Temperature of Mash Tun (deg F or C) Desired Strike Temperature (deg F or C) Temperature of Boiling Water (deg F or C) Temperature of Tap Water (deg F or C) Units of Measurement: American Metric The temperature of the strike water should be The volume of strike water should be For example mix of boiling water with of tap water.

Mash Thickness and Desired Strike Temperature to the Rest Calculator form.

### Rest Calculator

Calculate the amount of boiling water you need to raise your mash to the next rest temperature.

 Input Result Weight of Grains (lb or kg) Mash Thickness (qt/lb or liters/kg) Volume below false bottom (qt or liters) Mash tun equivalent water volume (qt or liters) Current Temperature (deg F or C) Target Temperature (deg F or C) Temperature of Boiling Water (deg F or C) Units of Measurement: American Metric The volume of added boiling watershould be

Mash Thickness (obtained by adding the boiling water) and Current Temperature (to Target Temperature).

Weigtht of Grains and Mash Thickness to the Mash Tun Calculator form.

### Mash Tun Volume Calculator

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!

 Input Result Weight of Grains (lb or kg) Mash Thickness (qt/lb or liters/kg) Volume below false bottom (qt or liters) Units of Measurement: American Metric The volume of the mash tun should be (excluding volume below false bottom)

Weigtht of Grains and Mash Thickness to the Water Calculator form.

### Water Calculator

Find out how much sparge water is needed to give a certain volume of wort after boiling.

 Input Result Weight of Grains (lb or kg) Mash Thickness (qt/lb or liters/kg) Volume below false bottom (qt or liters) Absorption in grains (qt/lb or liters/kg) Sparge Water (gallons or liters) Loss in lauter tun deadspace (qt or liters) Boiling Time (minutes) Evaporation rate (qt or liters per hour) Loss in kettle or other equipment (qt or liters) Units of Measurement: American Metric Mash volume Absorbed in grains Volume into kettle Evaporation Volume into fermenter

### American/Metric Conversion

Amount to Convert

Conversion
deg F to deg C
deg C to deg F
pounds to kilograms
kilograms to pounds
quarts to liters
liters to quarts
ounces to grams
grams to ounces

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 All-Grain Brewers.

Also check out Glenn Tinseth's Javascript hop bitterness and water chemistry calculators.

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