Rounding Error When Changing Units on Fermentables

Jurassic Brewer

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Hey folks,

I was adjusting a recipe today and idly thought it might be easier to bring the grain bill into the store in some other units, like grams or ounces. When fiddling with the units, I noticed my ABV/Gravity changing.

After a bit, I narrowed it down to a rounding error, I think.

If you set a fermentable at 0.75 lbs, then switch it to ounces it does just the right thing: 12 oz. But when you switch it back to lbs, it drops the second decimal, leaving me with 0.7 lbs and changing the recipe a bit. This happens with any of the other units (g, kg) as well.

Thanks!
 

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