Before BIABing, hence before discovering this site, I had been using one of the many bulk priming calculators on the web. After making the transition, I still relied on these rather than BIABacus, usually because it was easier to quickly access via my phone.

Now I have moved to all BIABacus, I have noticed the amount of dextrose required to be very different. For instance, the 19 litres (secondary volume) that I would like to prime to 2.5 volumes requires 105 grams of dextrose in BIABacus. Here is what I get from one of the many online calculators (in this case http://www.brewblogger.net/?page=tools& ... =calculate)

*Calculate Priming Sugar*

Desired C02 Saturation: 2.5 volumes

Amount of Liquid: 19 liters

Amount of Priming Sugar: 144.21 grams of corn sugar (dextrose)

Calculations derived from Mark Hibber's article from hbd.org.

Desired C02 Saturation: 2.5 volumes

Amount of Liquid: 19 liters

Amount of Priming Sugar: 144.21 grams of corn sugar (dextrose)

Calculations derived from Mark Hibber's article from hbd.org.

Like I said, I'm sure it's a case of PEBKAC, but I can't work it out. Any help appreciated.

Thanks in advance

HP