If you read this presentation "For the question of converting grain to extract, there is a short and a long answer. The short answer, based on typical all-grain processes and extract characte ristics, is to use 3/4 (0.75) lb of liquid extract for each pound of grain being substituted, or 2/3 (0.67) lb dry extract. Now technically that means that it takes more liquid extract to equal dry extract, but in practice, you can use one conversio n
factor or the other, even if you plan to mix dry and liquid extracts. My suggestion is to convert the entire amount of grain to liquid extract, subtract off “whole canfuls” (3.3 lb / 1.5 kg increments), and convert the remainder to dry extract. You can convert liquid extract to dry by multiplying by 0.89, or dry to liquid by multiplying by 1.1."
It's so easy you don't need beer smith!