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Bath or Shower

This is a complicated picture given the number of methods to heat the water and the flows of water that various showering techniques provide

So here are some rules of thumb:-

A medium sized bath uses 150L of water, a power shower for 10 minutes uses about 150L of water, so a bath and a power shower could cost about the same, if the water used in both is heated in the same way. A low flow shower uses about 50L of water and in this scenario, would cost about a third the price of a power shower.
Many of us have a gas boiler and an electric shower. Electric showers are low flow and in ten minutes may use 50L of water, however electricity costs over 3 times as much as gas at the moment and so surprisingly enough a shower and a bath in this case cost about the same.

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All calculations on this site are based on current fuel prices they are checked regularly and were last updated on:-
10^th May 2010
All calculation using current fuel prices are coloured red

The costs calculated for energy use based on these fuel prices should be regarded as 'good estimates' given that there are a variety of different fuel prices on offer in the country.

The calculations in the site also have different levels of accuracy depending on the nature of the calculation. For example calculating the energy use of a known power output TV is very easy compared when to calculating the effect on household costs with insulating your cavity walls.

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