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Calculators / Ecology / Household water use
Household water use calculator
Estimate household water use from daily per-person consumption.
On this page
Total water use18,000L
Total water use18m³
Daily household use600L/day
Calculator controls
How to calculate
Estimate household water use from daily per-person consumption.
total water = people × daily use per person × days
Worked example
People: 4; Daily use per person (L): 150; Number of days: 30.
Total water use: 18,000 L; Total water use: 18 m³; Daily household use: 600 L/day.
Assumptions and limits
Metered use includes actual fixtures, leaks, irrigation, visitors, and habits. Enter locally appropriate consumption.
Results are rounded for display; calculations use unrounded values. Read our calculation methodology.
Understanding the result
Estimate household water use from daily per-person consumption. Every assumption remains visible so the result can be checked or changed.
When this tool is useful
Use the household water use for an initial estimate, comparison, or classroom calculation.
Understanding your inputs
| Input | What to enter |
|---|---|
| People | Enter a number of at least 1 and no more than 1000. |
| Daily use per person (L) | Enter a number of at least 0 and no more than 1000000000000. |
| Number of days | Enter a number of at least 0 and no more than 366. |
Frequently asked questions
What are the limits of this household water use?
Metered use includes actual fixtures, leaks, irrigation, visitors, and habits. Enter locally appropriate consumption.
Can I use different units?
Use the units printed beside each field. Convert measurements first when your source uses different units.