Waste & Water

Waste

This may be the hardest section of the calculator to complete as most organisation's don't tend to keep records of how much waste they produce. “Best guess” estimates for the amount of waste produced can be used here.

Wheelie Bins

Wheelie bins come in a number of different sizes. We have used the sizes and capacities as described by BritishBins Ltd. The average weight of a bin bag full of waste is derived from a study produced by Lawmens Waste & Environmental Services. The figure for “Average Waste Weight” in the table is the amount of waste the bin will hold with an average number of 8kg bin bags of waste. Generally, councils don't like bins to be overfilled and may even refuse to move them if they are - so these numbers will be fairly accurate for most uses.

Capacity	Bin Bag Capacity	Average Waste Weight (kg)
120 litres	2-3	20
240 litres (UK average domestic bin)	3-5	32
360 litres	6-7	52
660 litres	10-12	88
770 litres	12-15	108
1,100 litres	15-20	140

Water

This section relates only to water supplied by pipe to your building(s). If you gather rain from guttering to store and use, that is not to be included.

If your building is on an unmetered connection then use a best guess estimate of water consumption. Generally, water supplied to the property and waste water should be equal – i.e. water in = water out.