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Annual household water
The daily figure scaled to a year, which is the period most utilities bill against.
The Formula
A = 365 x G
The daily figure scaled to a year, which is the period most utilities bill against.
| Symbol | Meaning | Unit | Notes |
|---|---|---|---|
| A | Annual use | gal/year | Total indoor water use over a year. |
| G | Daily total | gal/day | Total indoor water use for the household. |
What Each Symbol Means
Agal/year
Annual use
Total indoor water use over a year.
Ggal/day
Daily total
Total indoor water use for the household.
See It Worked With Real Numbers
A formula on its own does not tell you which number goes where. The how to calculate household water usage page applies this equation to a concrete case, shows every intermediate step, and names the mistakes that produce a wrong answer even when the algebra is right.
Where This Formula Appears
This equation is the working core of How To Calculate Household Water Usage, filed under Everyday Life. Every number the guide produces comes from substituting into this one line.