Free, simple homebrew calculators + BIAB checklist for every day use.

A collection of the hops, yeast, malt and equipment calculators I use for brewing. If you have any suggestions you can drop me a line on on post at eirikh no. Help me spread the word:

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Units

   
Strike Temperature

Estimates the temperature your strike water needs to be in order to hit the desired mash-in temperature. The calculator assumes that no heat will be lost to the surroundings. You can minimize this error by pre-heating the tun. Based on Palmer, in How to Brew.

Grain Weight kg
Grain Temp °C
Mash Liquid Volume L
Target Mash Temp °C
--- °C
Alcohol by Volume

Estimates your ABV based on your OG and SG/FG. Inspired by brewtoad, but with the alternative ABV formula.

Gravity version

Original Gravity :
Specific Gravity :

Brix version

Original Brix °Bx
Specific Brix °Bx
--- % ABV
Mash Infusion / Boiling water additions

Estimates the amount of hot/boiling water you need to add to hit your next mash/rest temperature. Please note that the calculator assumes that no heat will be lost to the surroundings. Based on Palmer, in How to Brew.

Grain Weight kg
Current Water Volume L
Current Mash Temp °C
Target Mash Temp °C
Hot Water Temp °C
--- L
Water Heating

Estimates the time it takes to heat water. Please note that the calculator assumes that no heat will be lost to the surroundings.

Initial Water Temp °C
Target Water Temp °C
Water Volume L
Heating Power W
--- minutes
Dilution Calculator (Find water addition - target gravity known)

Calculates the amount of water you need to add to get your wort to a desired gravity.

Initial Wort Gravity :
Desired Wort Gravity :
Wort Volume L
--- L
Dilution Calculator (Find final gravity - water addition known)

Calculates the final gravity you get when adding x amount of water to your wort.

Initial Wort Gravity :
Wort Volume L
Target Volume L
--- FG
Mash Size

Calculates the volume of your grains and strike water so you can check if your tun is large enough.

Grain Weight Kg
Mash Tickness L/kg
--- L


Hops Alpha Adjustment

Helps you adjust the amount of hops if the alpha acid differs between the receipe and your actual hops.

Recipe Hops Weight g
Recipe Hops Alpha %
Actual Hops Alpha %
--- g
Hops Storage Alpha Loss

Estimates the loss of alpha acid when you store hops. Based on MoreBeer Brewing Techniques.

Hops Alpha Acid %
Loss After 6 Months %
Storage Temperature °C
Storage Conditions
Hops Age d
--- % alpha acid
Hops Scheduler

Enter your hops schedule, click start and we will notify you (by sound) when you need to add hops to your boil and when the boil has finished.

Total boil time (minutes)

# Boil time (minutes) Hops / Addition
1
2
3
4
5
6

Elapsed time: 00:00:00

Remaining time: 00:00:00

Priming Sugar Calculator

Estimates how much priming sugar (Corn Sugar, Table Sugar or DME) to add for carbonation when bottling homebrewed beer. Based on braukaiser.com.

Beer Volume L
Beer Temperature °C
Desired Volume of CO2 :
Style & Volumes of CO2 (byo.com)
British ales1.5–2.2
Belgian ales2.0–4.5
American ales 2.2–3.0
European Lagers 2.4–2.6
American Lagers 2.5–2.8
German weizens 2.8–5.1

(the residual CO2 in your beer: --- )
--- g table sugar or ...
--- g corn sugar or ...
--- g DME
Keg Carbonation

Estimates the pressure you should set your regulator to when kegging beer to force carbonation. Based on brainlubeonline.com.

Keg Temperature °C
Desired Volume of CO2 :
Style & Volumes of CO2 (byo.com)
British ales1.5–2.2
Belgian ales2.0–4.5
American ales 2.2–3.0
European Lagers 2.4–2.6
American Lagers 2.5–2.8
German weizens 2.8–5.1

--- PSI
--- Bar
Keg Line Length Balancing

Estimates the line length for your draft beer keg system. Based on the formula from beersmith.com; L = (Keg Pressure – 1 – (Height/2)) / Resistance.
PS: I'm getting various reports on this not working, please see e.g. "Determining Proper hose length for your Kegerator" by Mike Soltys instead.

Keg Pressure bar
Elevation height cm
Line Resistance :
--- m
Brew Kettle Size

Calculates the volume of your brew tun/kettle.

Kettle Diameter cm
Kettle Height cm
Dead space / rd. corner adj. %
--- L
--- cm. (height of 1 L)
Hydrometer Temperature Correction

When measuring specific gravity using a hydrometer you need to correct for the temperature of the liquid. Based on brewtoad.

Measured Gravity :
Liquid Temperature °C
Hydrometer Calibration Temp. °C
--- Corrected SG
Refractometer Alcohol Adjustment

When using a refractometer to read the gravity of an alcoholic liquid, an adjustment is required on the reading to get correct results. Based on SeanTerrill.com and the alternative ABV formula.

Wort correction factor :

Gravity version

Original Gravity :
Refractometer reading :
--- % ABV
--- Adjusted SG

Brix version

Original Brix °Bx
Refractometer reading °Bx
--- % ABV
--- Adjusted °Bx
Convert from Brix to Gravity and back

Brix to Gravity conversion is an approximation. Based on byo.

Brix °Bx
--- SG
Gravity :
--- °Bx
Color Converter

Convert between the most common methods to measure color in brewing. Based on brewtoad.

SRM SRM
°L °L
EBC EBC
The Brew In a Bag (BIAB) Checklist

A to-the-point reminder checklist for BIAB home brewing including what to prepare the days before you brew. Customize it to your own setup by downloading the Word source.


The BIAB Checklist PDF (Word source)

There is also a Norwegian version available (Word source)

Changelog

  • 1.86 (28-Jun-2016): Added some social sharing buttons (non-tracking versions!).
  • 1.85 (24-Jun-2016): Hops Scheduler time input logic was not intuitive.
  • 1.84 (22-Jun-2016): Added a Hops Scheduler, and I now save your metric/US preference.
  • 1.83 (21-Jun-2016): Added Keg Line Balancing, and reordered the menu with categories.
  • 1.82 (20-Jun-2016): Also added Bar to Keg Carbonation.
  • 1.81 (19-Jun-2016): Added Keg Carbonation, show height of 1 L (or gal) in kettle size, more common units for the mash size/thickness calculator (qt/lbs and L/kg), fix bug with dilution (US version only), convert values when changing units.
  • 1.8 (17-Jun-2016): Priming Sugar added.
  • 1.7 (15-Apr-2016): Added the first version of The Engineer's BIAB Checklist.
  • 1.6 (26-Oct-2015): US/Metric switches added to each calculator + added this changelog.
  • 1.5 (25-Oct-2015): Mash Infusion added.
  • 1.4 (25-Oct-2015): Support for US units.
  • 1.3 (23-Oct-2015): Added Strike Temp and Hydrometer Temp.
  • 1.2 (23-Oct-2015): Initial online version.
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"THE BEER-WARE LICENSE" (Revision 42):
<post at eirikh no> wrote this file.  As long as you retain this notice you
can do whatever you want with this stuff. If we meet some day, and you think
this stuff is worth it, you can buy me a beer in return.   Eirik H
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