# Water Heating Time Energy Power Cost Calculator

These calculators compute how much time, energy, heating power, or costs is needed to heat water.

The calculator supports Celcius/Centigrade, Fahrenheit, Watts (w), Kilowatts (Kw), Btuh, Joule, British termal unit (Btu), liter, gallon, kg, lb, cubic inch, cubic foot etc.

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**Water Heating Time Calculator**

Calculator that tells you how long it takes to heat water from start to end temperature with a given heating power.

The calculator supports decimal numbers, use dot or comma.

If you are using the calculator for swimming pool heating, please add a sufficiently large margin of safety to compensate for all the heat losses.

Amount of water

Start temperature

End temperature

Heating power

Efficiency

%

Result:

?

Formula

The formula to calculate the heating time of water is as follows:

(amount of water in kg) • (end temperature in °C – start temperature in °C) • (4168 joules/kg/°C)/(heating power in watts)= heating time in seconds

To use the formula:

1) calculate the weight of water in kg

2) multiply that with the temperature difference in Celsius

3) multiply that with the constant of 4168

4) divide that by your heating power in watts

and the result is the heating time in seconds.

4168 is the constant for the heat capacity of water and means that it takes 4168 joules of energy to increase the temperature of 1 kilogram of water by 1 degree Celsius.

The heating power is in watts in the formula. A watt is defined as joules per second, e.g. 1W = 1 j/s = 1 joule per second.

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**Water Heating Energy Calculator**

This calculator tells how much energy will be consumed to heat the water from the start to end temperature.

The calculator supports decimal numbers, use a dot or comma.

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Amount of Water

Start temperature

End temperature

Efficiency

%

Result

?

**Water Heating Power Calculator**

This calculator tells you how much heating power is required to heat the water within a specified amount of time.

The calculator supports decimal numbers, use dot or comma.

Amount of water

Start temperature

End temperature

Time period available to heat the water (minutes)

Efficiency

%

Result

?

**Water Heating Cost Calculator**

This calculator tells you what the costs are when heating water.

Use the energy calculator to calculate how much energy you need to heat your water.

Then input the number below and click on the calculate button.

Energy used

Costs (in $, €, ...)

How often

Result

?

Next: no