Bug in alcohol percent calculation

I noticed that OG of 1.060 and 1.061 give the same alcohol percent.
This behavior doesn't depend on the FG value, and appears in both the PCT alcohol tool and the recipe design sheet.

Are you talking about the estimated or measured values?  They are separate and update based on the estimated or measured fields respectively.

The calculation is correct (it has been checked a ton of times) but round off error comes into play especially when working with the 1.0xx SG values.  Plato settings generally give better precision.

Brad