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Acid Value and Catalyst Calculator

Use this calculator to help determine your biodiesel recipe

If you have performed an acid number test, you can input your data to get an acid number and % of FFA or you can directly input a % FFA to arrive at the catalyst you need.

Acid Value


Titration value =

Blank value =

Normality of KOH =

Weight of sample in grams =

Fatty Acid Profile mostly...  


Acid Value = In mg KOH/g sample

% of FFA =


Use this calculator to determine how much catalyst you need for your biodiesel reaction


Sample size (Grams) =

% of FFA =

Catalyst Type  

% NaOCH3 in MeOH (Only for sodium methylate) =


Catalyst Amount (Grams) =

Recommended Extra Catalyst Amount (Grams) =