You can try weighing your empty carboy, mark its weight on it or a tag.
Figure that a gallon weighs roughly 8 lbs. If you wanna be more specific,
weigh out a volume of yer must/vino/whatever & do a little math... you can
get a reasonable conversion factor & a reasonable idea of wt/volume. a
little math along with a digital bathroom scale gives us a reasonable
working number. Hope this helps.


"William Frazier" > wrote in message
...
> Charles, I have lots of 2.8, 3, 5 and 6.5 gallon carboys. Each size
> varies in the volume of liquid they hold but it's not a big difference.
> Long ago I calibrated each size by adding water in increments and
> measuring the height of the water with a yard stick. These measurements
> have served me well and allow for selection of a receiving carboy when
> racking or blending. Send me an email address and I'll send you my chart.
>
> Bill Frazier
> Olathe, Kansas USA
>
> Sedgewick Halbritton wrote " I always end up guessing when blending
>> from multiple carboys into a single carboy. It would also be nice to
>> know exactly how much wine is in the carboy for more accurate chemical
>> additions. Any ideas???
>
>