Water usage calculator
Estimate daily, monthly and yearly water consumption and cost.
Your household
Results
Per day
0 L
0 m3
Per month
0 m3
0
Per year
0 m3
0
Breakdown (liters per day)
Showers
0 L
Toilet
0 L
Faucets
0 L
Dishwasher
0 L
Washing machine
0 L
Garden
0 L
Assumptions (editable in JS if needed): shower 9 L/min, flush 6 L, faucets 6 L/min, dishwasher 12 L/cycle, washing machine 50 L/cycle.

Water usage calculator estimates monthly and yearly consumption for a household or small business based on typical habits (showers, laundry, dishwasher, toilet flushing). It is useful for sizing water treatment solutions (softener, whole-house filtration, service planning) and for explaining running costs to customers.

The result is an approximation. Accuracy depends on your inputs, water pressure, fixtures and daily routines. For equipment sizing, confirm with real meter readings over at least 7-14 days.

FAQ - Water usage calculator

How can I estimate water use without bills?

Start with the number of people and the main activities (showers, laundry, dishwasher). It provides a solid baseline for planning.

How many liters are in 1 m3?

1 m3 equals 1000 liters. This helps you interpret results and compare different scenarios.

What usually drives water consumption the most?

Showers, toilet flushing, outdoor use and frequent laundry. Fixture type and shower time matter a lot.

How do I include garden watering or car washing?

Add seasonal usage separately. Estimate extra liters per week and convert to a monthly figure.

Can I use this result to size a water softener?

Yes as a starting point for volume and flow assumptions. You still need water hardness and desired regeneration frequency.

Why does the estimate differ from my water meter?

Differences come from habits, leaks, pressure, appliance cycles and uncounted uses. Adjust inputs based on real readings.

How can I reduce water use without losing comfort?

Fix leaks, use aerators, shorten showers and run appliances efficiently. Small changes often add up quickly.