Household water use and cost
Household water use and cost: calculate a transparent estimate from the values and assumptions you provide.
Your inputs stay in your browser. Displayed results are rounded to a maximum of 12 significant digits.
Method and assumptions
Method version 1.0.0 · Updated
Calculate
Formula: volume = people × litres/day × days / 1000; cost = volume × price/m³
Household water use and cost: calculate a transparent estimate from the values and assumptions you provide.
- people
- Number of people
- litersPerPersonPerDay
- Litres per person per day (assumption)
- days
- Number of days
- pricePerM3
- Price per m³ in local currency
Per-person use and tariff are user-entered assumptions; this is not a bill.
Calculate with code
These short examples use the same inputs and core calculation as this tool. Adapt validation and formatting to your application.
JavaScript
const waterCost = 12 * 4.2; // 50.4