Beersmith calculation - can you please make me sense of it?

[Suicid]

Hi folks,

Can you please make sense of those? Est and measured OGs are the same. Est and meas FGs are the same. Est and meas volumes are the same.

And still - est and meas attenuations AND est and measured ABVs are DIFFERENT??? How can it be?

 

[Peebee]

Rounding errors.

You "think" you are entering the same number, but the number you are copying has n decimal places that you assume to be one or two decimal places ... because that's all you can see of it.

E.g. "Est" is 1.45. But it's been rounded and displayed as 1.5. You copy 1.5 into "Meas". Result: The numbers you think are the same ... aren't! The difference shows up later in the calculations. The differences will be insignificant, but annoying all-the-same.

[EDIT: If you want to get farty about them ... in your example, try putting the FG in "Measured FG" as 1.0135. Might correct it? Might need to change "Meas Bottling Vol". Okay, that's enough proof that I'm un-necessarily "farty"!]
[EDIT2: Overlooked "OG" ... Try changing "Measured OG" to 1.05345. It'll still display as "1.054". Can I shut up now? Gawd, I do go on... and on ]