Water Usage Calculator
Estimate your daily, monthly, and annual water usage and cost. Identify which activities use the most water.
Inputs
Results
Daily Usage
46.5 gal
≈ 9 buckets
How to Use This Calculator
- Enter how many showers your household takes per week and the average shower length in minutes.
- Enter total toilet flushes per day and laundry loads and dishwasher runs per week.
- Optionally set your water rate in $ per 1,000 gallons from your utility bill (advanced field).
- Review your estimated daily, monthly, and annual water usage in gallons, plus monthly and annual cost.
- Check the chart breakdown to see which activity — showers, toilet, laundry, or dishwasher — uses the most water.
How the result changes with Showers per Week
| Showers per Week | Daily Usage |
|---|---|
| 2.1 | 35.3 gal |
| 7.35 | 47.3 gal |
| 14 | 62.5 gal |
| 19 | 73.9 gal |
What each input means
- Showers per Week
- Total number of showers taken per week by all household members
- Avg Shower Length
- Average duration of each shower in minutes
- Toilet Flushes per Day
- Total daily toilet flushes for the entire household
- Laundry Loads per Week
- Number of washing machine loads run per week
- Dishwasher Runs per Week
- How many times per week you run the dishwasher
- Water Rate
- Price per 1,000 gallons from your water utility bill
How this is calculated
Worked example, using the default values
- Identify Input Parameters4 parametersShowers per Week = 7, Avg Shower Length = 8, Toilet Flushes per Day = 6, Laundry Loads per Week = 3 = 6 input(s) provided
- Calculate Daily Usage46.5 = 46.5
- Calculate Monthly Usage1394 = 1394
- Calculate Annual Usage16957 = 16957
Engine last updated . Checked against 1 independently-derived test — how we verify calculators.
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