that number is not correct until you use the calculator for that recipe, the calculator is correct, Im not sure if the cell on the recipe gets updated after using the calculator but it should
The number stays consistently wrong regardless of what you do in there .
The error appears to be in the Javascript shown it the screenshot (pretty printed). The "batchsize" global variable is in gallons in my editor regardless of the fact that I'm working in litres. As it assumes the batchsize is in metric units instead, it is failing to convert the value in gallons to litres before calculating the pitch rate, hence returning just over a quarter of the correct number.