Mash Chemistry and Brewing Water Calculator

Brewing Water Treatment with Confidence (v1.6) [release history]

Whether you are a brewer looking for a tool that allows you to calculate a resulting water profile based on a source water profile and salt additions or a brewing water expert who wants to figure out the amount of slaked lime needed for optimal alkalinity precipitation, this tool has you covered. It is designed to be simple and intuitive to use yet sufficiently accurate in its implementation of the underlying chemistry.

Jump to documentation

Mash pH:

Linked from recipe: Nut Brown I
The following values have been pre-loaded based on the recipe and your profile: water requirements, target water profile, grain bill, salts and acids from Other Ingredients.

Save / Reload:
Title:
Description:
Save:
Record ID:
URL:	Anyone with the URL may load this record. Records created anonymously may be loaded AND edited by anyone. If you are signed into Brewer's Friend, the system links the record to your account, and only you may edit this record. (Others may still view, but when they load and hit save, they will be issued a new record id.)

Reload:	Enter an existing Record ID and click the 'Reload' button to recall it.
	Click here to list all your saved records. Also available under My Brewing -> My Water Calcs (requires login).

Water Volumes:
Unit Preference:	US (gal/pound) SI (liter/kg)
Summary:	Show Overall Water Summary in Each Section
Total water volume:		The total water volume to be treated may be larger than mash and sparge water combined.
Mash water:
Sparge water:
	Use different water sources for mash and sparge
	Blend Waters
Water B Amount		l/gt/gal are absolute volumes.

Water Target Selection:

Target Water:
Description:
	Ca⁺²	Mg⁺²	Na⁺	Cl^-	SO₄^-2	HCO₃^-
ppm or mg/L

	Ca⁺²	Mg⁺²	Na⁺	Cl^-	SO₄^-2	HCO₃^-
Actual

Delta

Salt Additions:

Salts:

Salts Added to Mash Only

↓ Lowers pH and ↑ Raises pH

Salts can be entered as g or mg/l. The latter assumes total volume when mash and sparge are same waters and it assumes mash volume when they are different waters.

↓ Gypsum:

Ca⁺² SO₄• 2H₂O

↓ Epsom Salt:

Mg⁺² SO₄• 7H₂O

↓ Canning/Other Salt:

NaCl

↓ Calcium Chloride (dihydrate):

Ca⁺² Cl₂• 2H₂O

↓ Calcium Chloride (anhydrous):

Ca⁺² Cl₂

↓ Magnesium Chloride:

Mg⁺² Cl₂• 6H₂O

↑ Chalk:

Ca⁺² CO₃

↑ Baking Soda:

Na⁺ HCO₃

↑ Slaked Lime:

Ca(OH)₂

↑ Lye:

NaOH

Boiling and Lime Softening:

Boil Water:

Boil Water

Boiling the water reduces alkalinity and precipitates chalk. The chalk is assumed to remain in the water until the 'decant water' box is checked.

Precipitate CaCO3:

Precipitate CaCO3

When set, the water calculator will precipitate excess CaCO3 based on its solubility. This is needed for slaked lime treatment to reduce alkalinity. When not set, slaked lime will increase alkalinity, which may also be the intent.

Decant Water:

Decant Water

This is needed when lime or sodium hydroxide is added since the calculator will have precipitated chalk in its model in that case.

Acid Additions:

Acid:

Acid Added to Mash Only

Specify acid by target mash pH

Acid Type:

Acid Concentration:

Acid Amount:

Target mash pH:

Acidulated Malt *:

* in addition to any acidulated malt specified in the malt bill

Mash Water Report Before Dough-In:

Sparge / Kettle Salt Additions:

↓ Lowers pH and ↑ Raises pH

↓ Gypsum:

Ca⁺² SO₄• 2H₂O

↓ Epsom Salt:

Mg⁺² SO₄• 7H₂O

↓ Canning/Other Salt:

NaCl

↓ Calcium Chloride (dihydrate):

Ca⁺² Cl₂• 2H₂O

↓ Calcium Chloride (anhydrous):

Ca⁺² Cl₂

↓ Magnesium Chloride:

Mg⁺² Cl₂• 6H₂O

↑ Chalk:

Ca⁺² CO₃

↑ Baking Soda:

Na⁺ HCO₃

↑ Slaked Lime:

Ca(OH)₂

↑ Lye:

NaOH

Sparge Water Acidification:

Acid Type:

Acid Concentration:

Acid Amount:

Target sparge pH:

Acidify Sparge Water:

Acidify Sparge Water

Grist Info:

grist pH properties are based on none given Beer color malt bill

Grist Weight:

Beer Color SRM:

% Roasted Color:

malt name

weight

type

Lovibond

Grist DI water pH:
Grist pH buffer: mEq⋅kg^-1⋅pH^-1

Mash Report:

Mash pH *: Sparge pH:

Mash thickness:
pH Delta from Water:

effective water residual alkalinity: ppm as CaCO₃
effective strength of weak acids: ppm as CaCO₃
* mash prediction is for mash sample cooled to 25 C / 77 F

Overall Water Report:

Ca⁺²	Mg⁺²	Na⁺	Cl^-	SO₄^-2	Alkalinity	Residual Alkalinity
mg/l	mg/l	mg/l	mg/l	mg/l	ppm as CaCO₃	ppm as CaCO₃