cost to run 1500 watt heater

How much does it cost to run a 1500 Watt Heater?

Want to know how much it costs to run a 1500-watt heater? Enter your details into the electricity cost calculator below to find out.


(Estimated Running Cost)

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The calculator is set to 29p per kWh by default. You can change this value if you’re paying a different amount.

How much does it cost to run a 1,500 watt heater for 24 hours UK

To calculate the cost of running a 1,500-watt heater for 24 hours, we’ll assume that the heater operates continuously at its full power rating and that the electricity rate is constant at 29 pence per kWh throughout the day. Here’s the breakdown:


  • Power of the heater: 1,500 watts (or 1.5 kW)
  • Time of use: 24 hours
  • Electricity cost: 29 pence per kWh

First, we need to convert the heater’s power rating to kilowatts: 1,500 watts = 1,500 / 1,000 = 1.5 kW

Next, we multiply the power by the time of use to find the total energy consumption:

  • Energy consumed = Power rating x Time of use
  • Energy consumed = 1.5 kW x 24 hours = 36 kWh

Finally, we calculate the cost by multiplying the energy consumed by the cost per kWh:

  • Cost = Energy consumed x Cost per kWh
  • Cost = 36 kWh x 29 pence/kWh
  • Cost = £10.44

So, running a 1,500-watt heater for 24 hours would cost approximately £10.44 in the UK.

Variable electricity rates: If your provider has tiered rates or time-of-use pricing where electricity costs vary throughout the day, you would need to calculate the costs based on the specific rate schedule.