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Shower Cost Calculator

Estimate the cost of showers for one person or a whole household. Enter whether the shower is electric or gas-heated, add your tariff and water charges, then set how often each person showers and how long they stay in.

Enter your shower details

Only used when you choose an electric shower.

Only used when you choose a gas-heated shower.

Use your combined water and wastewater cost if possible. 1 m³ = 1,000 litres.

This is the actual water coming out of the shower head. Presets can fill this automatically.

A practical default is 27°C, roughly from cold mains water to a warm shower mix.

Only used for gas-heated showers. Leave the default if you are unsure.

The table below will show up to eight rows, but only the first selected rows are included in the totals.

Person Showers per week Minutes per shower
Average cost per shower £0.82
Total weekly cost £9.81
Total monthly cost £42.52
Total yearly cost £510.28

Household summary

Shower type Electric shower
People included 2
Total showers per week 12.0
Flow rate used 9.0 L/min
Water rate used £4.20/m³
Electricity rate 27.0p/kWh
Annual water used 40,248 L
Annual energy used 1,263.8 kWh

Per-person costs

Person Cost / shower Weekly Monthly Yearly
Person 1 £0.91 £6.39 £27.69 £332.27
Person 2 £0.68 £3.42 £14.83 £178.00
Total £0.82 £9.81 £42.52 £510.28

Usage and cost breakdown by person

Person Showers / week Minutes / shower Litres / shower Water cost / shower Energy cost / shower Yearly total
Person 1 7.0 8.0 72.0 L £0.30 £0.61 £332.27
Person 2 5.0 6.0 54.0 L £0.23 £0.46 £178.00

How to read this estimate

  • This is a practical estimate using shower length, flow rate, water charges and energy needed to heat the water.
  • Water cost is treated as a combined water-and-wastewater rate in £ per cubic metre. One cubic metre equals 1,000 litres.
  • For gas-heated showers, the calculator adjusts the energy bought from your tariff using the boiler efficiency you enter.
  • Real costs vary with incoming cold-water temperature, actual shower temperature, exact flow rate, tariff structure and whether some wastewater charges are billed differently.

What this shower cost calculator includes

This tool estimates shower cost from three main things: the amount of water used, the cost of that water, and the energy needed to heat it. It works for electric showers and gas-heated showers and lets you split usage across up to eight people.

Why flow rate matters so much

Two showers that both last eight minutes can cost very different amounts if one uses far more water per minute. That is why the calculator asks for shower flow rate, with simple low, standard and high-flow presets plus a custom option.

Why the gas version asks for boiler efficiency

A gas boiler has to burn more energy than the hot water actually delivered into the shower. The efficiency input helps convert the useful hot-water energy into the gas you actually pay for.

Important note

This is an estimate rather than a bill replica. Actual cost varies with incoming cold-water temperature, target shower temperature, exact shower head flow, tariff structure, boiler performance and how your local water company charges for wastewater.