How Much It Costs To Run A 750-Watt Heater For 1, 8, 24 Hours?

“I’ve got a small 750W electric space heater. Trying to figure out electricity usage. Can you help me calculate how much does it cost to run a 750W heater if I run it 24/7?”

Of course. Alright, this is not all that difficult. We will show you how to determine 750-watt electric heater energy expenditure (kWh) and running cost ($ per 1, 8, and 24 hours).

We have calculated, based on different electricity costs ($/kWh), how expensive it is to run a 750W electric heater for 1 hour, 8 hours, and 24 hours. We have gathered all the results in 3 neat charts (1st chart for 1-hour running cost, 2nd chart for 8-hour running cost, and 3rd for 24-hour or daily running cost).

Let’s first figure out the electricity usage:

How Much Electricity Does A 750-Watt Heater Use?

Any 750-watt heater running at 100% output will consume 750 watts of electric power per hour. That means that such a heater uses:

  • 0.75 kWh of electricity per 1 hour.
  • 1.5 kWh of electricity in 2 hours.
  • 3 kWh of electricity in 4 hours.
  • 6 kWh of electricity in 8 hours.
  • 18 kWh of electricity in 24 hours.

We can see that running a 750-watt electric heater for 24 hours uses 18 kWh of electricity. Now, to determine how much it costs to run a 750-watt heater for 24 hours non-stop, for example, we just need to calculate how much 18 kWh of electricity costs. Here’s how we can do that, including the before mentioned 3 charts:

How Much Does It Cost To Run A 750-Watt Heater?

All 750-watt heaters have the same electricity expenditure (0.75 kWh per hour). However, the cost of running a 750-watt heater is not always the same because it depends on electricity rates; basically how much you pay for a kilowatt-hour ($/kWh) in your area.

750 watt heater running cost depends on electricity rates
You can check your electricity cost (in dollars per kWh) on your monthly electricity bill.

Here is a formula to calculate how much it costs to run a 750W electric heater:

Running Cost (750W Heater) = 0.75 kWh × Number Of Hours × Electricity Rate ($/kWh)

In the US, you can pay as little as $0.05 per kWh or as much as $0.40 per kWh (California, I’m looking at your outrageous electricity prices).

Quick Example: Let’s say that you run a 750W heater for 24 hours, and your electricity is $0.20. How much will you pay to run this heater for a day? Let’s insert all these figures in the equation above like this:

Running Cost (750W, 24h, 0.20$/kWh) = 0.75 kWh × 24 h × $0.20/kWh = $3.60

We can see that, if electricity costs $0.20/kWh, it will cost $3.60 to run a 750-watt heater per day (24 hours). Of course, the running cost will be lower, if your electricity cost per kWh is below $0.20/kWh, or it can be higher, if your electricity cost per kWh is above $0.20/kWh.

To help everybody, we have calculated how much it costs to run a 750-watt heater per hour, per 8 hours, and per 24 hours, with electricity rates ranging from $0.05/kWh to $0.40/kWh. We have summarized all the results in the following 3 charts (with the commentary below the charts).

Let’s start with the 1st per 1-hour chart, and we will proceed to 8-hour and 24-hour running cost charts:

750-Watt Heater Running Cost Per Hour (1st Chart)

Electricity Price ($/kWh): 1-hour 750-Watt Heater Cost:
$0.05/kWh $0.0375 Per Hour
$0.10/kWh $0.075 Per Hour
$0.15/kWh $0.1125 Per Hour
$0.20/kWh $0.15 Per Hour
$0.25/kWh $0.1875 Per Hour
$0.30/kWh $0.225 Per Hour
$0.35/kWh $0.2625 Per Hour
$0.40/kWh $0.30 Per Hour

As we can see, the hourly running cost of a 750-watt heater ranges from about 4 cents to 30 cents per hour (we are talking US cents).

Since the average electricity rates in the US are around $0.14/kWh, most households will have to pay about 10 US cents to run a 750-watt heater for 1 hour.

Let’s look at a similar 8-hour and 24-hour running cost:

750-Watt Heater Running Cost For 8 Hours (2nd Chart)

Electricity Price ($/kWh): 8-hour 750-Watt Heater Cost:
$0.05/kWh $0.30 For 8 Hours
$0.10/kWh $0.60 For 8 Hours
$0.15/kWh $0.90 For 8 Hours
$0.20/kWh $1.20 For 8 Hours
$0.25/kWh $1.50 For 8 Hours
$0.30/kWh $1.80 For 8 Hours
$0.35/kWh $2.10 For 8 Hours
$0.40/kWh $2.40 For 8 Hours

We can see that running a 750W electric heater for 8 hours costs anywhere from $0.30 to $2.40.

Again, if we take that US average electricity price of about $0.14, many households are expected to pay less than $1 to run such a unit for 8 hours non-stop.

Let’s look at how much it costs to run a 750-watt heater per day (24 hours):

750-Watt Heater Running Cost For 24 Hours Or Per Day (3rd Chart)

Electricity Price ($/kWh): 24-hour 750-Watt Heater Cost:
$0.05/kWh $0.90 For 24 Hours (Per Day)
$0.10/kWh $1.80 For 24 Hours (Per Day)
$0.15/kWh $2.70 For 24 Hours (Per Day)
$0.20/kWh $3.60 For 24 Hours (Per Day)
$0.25/kWh $4.50 For 24 Hours (Per Day)
$0.30/kWh $5.40 For 24 Hours (Per Day)
$0.35/kWh $6.30 For 24 Hours (Per Day)
$0.40/kWh $7.20 For 24 Hours (Per Day)

As we can see, households with the cheapest electricity are expected to pay less than $1 to run a 750-watt space heater for 24 hours. Households with more expensive electricity will see their bills go up by $5, $6, or even more than $7 per day for running a 750-watt heater continuously.

Alright, what if we run a 750-watt heater for 30 days? How much will that cost?

We just multiply these daily costs by 30 to get to the monthly running costs (30 days = 1 month). That means that it costs anywhere from $27/month to whooping $216/month to run a 750-watt heater.

You can check a similar calculation for 500-watt heaters here and 1500-watt heaters here. You can also check out the universal space heater running cost calculator here.

All in all, you can see that the running cost of these space heaters heavily depends on electricity cost per kilowatt-hour ($/kWh). We hope that these 3 charts illustrate well how much it should cost to run a 750-watt heater. If something is unclear or if you would like for us to help you out, you can use the comment section below, give us a few numbers, and we can do some math for you.

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