What is Water Consumption Calculator?
Water Consumption Calculator helps you estimate water consumption from household size and daily use per person.
The main result is water consumption, with a breakdown of daily household use. The formula, example and assumptions below explain how to interpret it.
How to use Water Consumption Calculator
Use the example to get familiar with the form, then enter your own figures. Any rates in the example are illustrative. Check the field labels and units before calculating.
- Gather people, daily water per person (litres) and days. Use values from the same situation or reporting period.
- Replace the example people with your own value, then complete the other fields. Check the displayed units.
- Select Calculate and read water consumption with its result breakdown. Change one input and calculate again to compare a second scenario. Reset restores the original example.
- Enter people, at least 1 and at most 10000. Use a whole number.
- Enter daily water per person in litres, at least 0. Decimals are accepted.
- Enter days, at least 1 and at most 3660. Use a whole number.
Water Consumption Calculator: a worked example
With the inputs below, the result is 16.2 kL (water consumption). Follow the example, then replace these illustrative values with your own.
| Input or output | Example value |
|---|---|
| People | 4 |
| Daily water per person (litres) | 135 litres |
| Days | 30 |
| Water consumption | 16.2 kL |
| Daily household use | 540 litres |
Understanding the Water Consumption result
Read water consumption alongside daily household use. These describe different parts of the same calculation.
Displayed results use a readable number of decimal places. When checking a result by hand, keep extra precision until the last step. To compare scenarios, change one input at a time and keep the others fixed.
- Example Daily household use: 540 litres
Water Consumption Calculator: assumptions and common mistakes
A useful estimate starts with the right inputs. Check the following assumptions and limits before applying the result to your situation.
- Match factors to your location and reporting period. A result covers the sources you entered, not an independently verified full footprint.
For wider guidance, visit GHG Protocol calculation guidance. The formula and scope of this specific tool are stated on this page.
