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Independent, evidence-based water education · Reviewed for 2026

Environment & Conservation · Tool

Water Conservation Calculator

See how everyday habit changes translate into real annual water savings — and what those totals mean in practice.

4.8 (176) Free & private — runs in your browser

Select the habits you have adopted or plan to adopt:

Annual savings are approximate averages based on typical household usage. Your actual savings will depend on existing habits and appliance models.

Select habits above to see your estimated annual savings.

Educational estimates only — not medical, engineering or professional advice.

Small changes at home can add up to surprisingly large savings over a year. Fixing a dripping tap, shortening showers or switching to a low-flow showerhead each contribute meaningfully when you think in annual rather than daily terms.

This calculator lets you select the habits you have already adopted — or are thinking about — and instantly shows the combined estimated annual saving. It is a guide to help you think about impact, not a guarantee of exact figures.

How to use this tool

Tap or click any habit chip to toggle it on or off. The five habits included are:

  • Fix a dripping tap — a slow drip can waste roughly 20,000 litres a year.
  • Shorter showers — reducing shower time by a few minutes saves around 11,000 litres a year for a typical household.
  • Tap off while brushing — leaving the tap running while brushing teeth wastes roughly 5,500 litres a year.
  • Full loads only — waiting for full dishwasher and laundry loads saves around 9,000 litres a year.
  • Low-flow showerhead — fitting a water-efficient showerhead can save approximately 14,000 litres a year.

A little background

The savings figures are approximate averages based on typical household usage patterns. Real savings depend on your current habits, number of people in the household and existing appliance efficiency.

The bathtub equivalent in the results (using 150 L per bath) gives a relatable sense of the scale of potential savings. For a broader picture of home water use, try the Water Usage Estimator.

Tool FAQ

They are approximate annual averages based on typical household usage. A dripping tap can waste 4,000–20,000 L/year depending on drip rate; the figures here use the middle-to-upper range as a guide.

Yes — a tap dripping once per second can waste around 30 L a day. Over a year that is close to 11,000 L. A fast drip can easily reach 20,000 L or more annually.

The calculator adds them for simplicity. In practice some overlap is possible (for example, a low-flow showerhead and shorter showers both affect shower water use), so the total should be treated as a guide rather than a precise figure.

Collecting rainwater for gardening, fitting a dual-flush toilet, and choosing water-efficient appliances when replacing old ones are all effective steps. Our guide on water conservation myths covers some common misconceptions too.
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