Conta água estimada
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
About this calculator
The 'Estimated water bill' calculator estimates domestic water costs based on the number of people, consumption days, and local tariff. It uses the formula: (liters per person/day × people × days × tariff) / 1,000. The division by 1,000 converts liters to cubic meters, a common billing unit for water services.
Use this tool to plan expenses for rentals, seasonal homes, or events with guests. The calculation assumes average per-person consumption, but variations like leaks, appliance use, or irrigation can affect results. Always verify the exact tariff with your local provider.
Data like 'liters per person/day' are approximate (usually 120-150 L in Brazil). Regional tariffs may include fixed fees or tiered pricing. This calculator is not a replacement for actual bills but provides a baseline for preliminary budgeting.
Frequently asked questions
How does the calculator formula work?
It multiplies average liters per person/day, number of people, days, and local tariff, then divides by 1,000 to convert liters to cubic meters.
What is the average consumption per person?
In Brazil, it ranges from 120 to 150 liters per person per day, depending on climate, habits, and region.
Does the tariff vary by city?
Yes. Providers apply different rates. Check your invoice or local utility website for exact values.
Why might the result differ from the actual bill?
Factors like leaks, electric showers, pool cleaning, or meter readings affect the final bill.