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Everyday Calculators

Water Bill Estimator

Estimate a metered water bill. Enter your usage, the rate per unit, any fixed meter charge and the sewerage charge (often a percentage of the water charge).

$
$
% of water charge
Estimated bill$564.80
Water charge
$396.00
Sewerage
$118.80
Fixed charge
$50.00
Usage in litres
18,000 L
Per day (30-day cycle)
600 L
Step-by-step working
  1. Water = 18 × $22.00 = $396.00
  2. Sewerage = 30% × $396.00 = $118.80
  3. Total = $564.80

How to use the Water Bill Estimator

  1. Enter the usage and choose its unit.
  2. Enter the rate, fixed charge and sewerage percentage from your bill.
  3. Press Calculate.

Formula

Bill = usage × rate + usage × rate × sewer% + fixed charge.

Examples

  • 18 kL at 22 per kL, 30% sewerage, 50 fixed: 396 + 118.80 + 50 = 564.80.

Frequently asked questions

How much water does a household use?

It varies widely. A common planning figure in Indian cities is 135 litres per person per day; US households often use 300+ litres per person.

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