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Shower Water Usage Calculator

Litres = flow_rate × minutes — daily and monthly shower water use.

Calculates water and water-heating energy used per shower, and monthly totals, from shower head flow rate, duration, and household members.

Daniel Oh By Daniel Oh
Published Last reviewed 1 min read

Inputs

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

Litres/shower = flow × duration; Monthly = litres × people × 30

In depth

Calculates water and water-heating energy used per shower, and monthly totals, from shower head flow rate, duration, and household members.