CostRunningWhat is my whole bill made of?
One appliance at a time answers a question. All of them at once answers the bill.
One thing off the bill each month
MonthlyOne appliance a month worth measuring or changing, and what it does to the yearly total. No tariff pitches, no prices — the numbers that stay true.
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How this works
Where a typical bill goes
The share of an all-electric household bill by category, which is what an audit usually confirms.
| Category | Share of a typical all-electric bill |
|---|---|
| Space heating | 35–50% |
| Water heating | 15–25% |
| Cooling | 5–15% |
| Kitchen and laundry | 10–15% |
| Refrigeration | 5–8% |
| Everything with a screen | 4–8% |
| Standby | 3–6% |
Heating and hot water are most of the bill in most homes. Everything with a screen, together, is rarely more than a tenth.
Frequently asked questions
What if my total does not match the bill?
It rarely matches exactly, and the gap is informative. Under by a lot usually means space heating or hot water is missing, or that running hours are underestimated. Over usually means hours plugged in were entered rather than hours actually running.
Should I include standing charges?
No. A standing charge is a fixed fee for being connected and does not belong to any appliance. Compare this total against the energy portion of the bill, not the grand total.
How accurate is this?
As accurate as the wattages and hours you put in. A plug-in energy monitor on the three or four biggest items turns an estimate into a measurement, and the rest rarely matters enough to chase.