Brewing efficiency measures the percentage of potential sugar in the grain that was extracted into the wort.
Once you have measured the efficiency of your homebrew setup, you will be able to adjust the quantity of malt used in recipes.
How to use the brewing efficiency calculator
When using this calculator, you should enter the volume of wort in litres and the specific gravity readings. After this, you should select the grains and other adjuncts used from the drop-down lists (one per line) and enter the weight of each.
To calculate Brewhouse Efficiency, the volume of wort and specific gravity reading should be measured when the wort is in the fermenter, before fermentation takes place.
To calculate Mash Efficiency, the volume of wort and specific gravity reading should be measured when the wort is in the brew kettle, before it is boiled.
I’ve included 7 lines for different grain and adjuncts which should be sufficient for most recipes. If you use fewer grains you should leave the weight displayed on the other lines as zero kilograms. If you need more lines to be added or have any questions, please get in touch by using the contact form at the bottom of the page.
If the grain you are using isn’t listed, you should select a similar grain from the list. The table below shows the values used by the calculator for each grain.
The calculator currently only works with metric units, I plan to add imperial units at a later date (check back soon).
The extract yields used by the calculator are listed in the table below and come from the spec sheets on the manufacturers’ websites.
In a few cases, both manufacturers produce similar grains with the same name, in which case the average value is used.
|Extract Yield (LDK)
|Best Pale Ale Malt
|Crystal Extra Dark
|Extra Plae Ale Malt
|Finest Lager Malt
|Finest Pale Ale Golden Promise™
|Finest Pale Ale Maris Otter
|Golden Naked Oats™
|Greenwich Crystal Malt
|Heritage Crystal Malt
|Low Colour Maris Otter
|Maris Otter Blend
|Maris Otter Crystal Malt
|Maris Otter Finest Ale Malt
|Maris Otter Low Colour
|Maris Otter Pale Ale
|Medium Dark Crystal
|Pale Ale Low Colour
|Pale Ale Malt
|Premium English Caramalt
|Red Rye Crystal
|Scottish Ale Malt
|Scottish Golden Promise
|Winter Pale Ale
|Winter Pale Ale Low Colour