I stumbled upon a thread on an Aussie forum that debated the IBUs in Coopers kits, which are provided on the Coopers website, and how to calculate the IBUs in the final volume. They settled on this, which may be of use to people who tinker with Coopers kits or use them as a base and don't know the IBUs:
Using the formula: IBU of tin*1.7/23 (If making up to 23 litres)
Lager = 390 = 28.8
Draught = 420 = 31.0
Dark Ale = 590 = 43.6
Real Ale = 560 = 41.4
Stout = 710 = 52.5
Pale Ale = 340 = 25.1
Mex Cerveza = 270 = 20.0
Can Blonde = 420 = 31.0
English Bitter = 590 = 43.6
Euro Lager = 340 = 25.1
Heritage Lager = 390 = 28.8
IPA = 710 = 52.5
Irish Stout = 560 = 41.4
Aust Bitter = 495 = 36.6
Pilsner = 420 = 31.0
Sparkling Ale = 490 = 36.2
Trad Draught = 420 = 31.0
Wheat Beer = 300 = 22.2
Using the formula: IBU of tin*1.7/23 (If making up to 23 litres)
Lager = 390 = 28.8
Draught = 420 = 31.0
Dark Ale = 590 = 43.6
Real Ale = 560 = 41.4
Stout = 710 = 52.5
Pale Ale = 340 = 25.1
Mex Cerveza = 270 = 20.0
Can Blonde = 420 = 31.0
English Bitter = 590 = 43.6
Euro Lager = 340 = 25.1
Heritage Lager = 390 = 28.8
IPA = 710 = 52.5
Irish Stout = 560 = 41.4
Aust Bitter = 495 = 36.6
Pilsner = 420 = 31.0
Sparkling Ale = 490 = 36.2
Trad Draught = 420 = 31.0
Wheat Beer = 300 = 22.2