Water Usage Calculator: Estimate Daily Household Consumption
Calculate how many gallons of water your household consumes daily.
Understanding Water Consumption
Water conservation is becoming increasingly important. While we often think about drinking water, the vast majority of domestic water use comes from showers, toilets, and washing machines.
Typical Water Usage by Activity
| Activity | Gallons Used |
|---|---|
| Standard Shower | 2.5 gallons per minute |
| Low-Flow Shower | 1.5 gallons per minute |
| Toilet Flush (Old) | 3.5 to 7 gallons |
| Toilet Flush (New) | 1.28 to 1.6 gallons |
| Washing Machine | 15 to 45 gallons per load |
How to Estimate Shower Usage
- Multiply the number of people in the house by the average shower duration (in minutes).
- Multiply total minutes by the flow rate of the showerhead (standard is 2.5 GPM).
- Example: 4 people × 10 mins = 40 mins total. 40 mins × 2.5 GPM = 100 Gallons per day just for showers.
Water Saving FAQs
How much water does the average person use?
The average American uses about 80-100 gallons of water per day for indoor home uses.
Does a bath use more water than a shower?
Usually, yes. A full bathtub holds about 36 to 50 gallons. A 10-minute shower with a low-flow head might only use 20 gallons.