How much does it cost to run a 1500W heater for 24 hours?

A 1500W heater uses 1.5 kWh per hour. Running it for 24 hours uses 36 kWh. At an average electricity rate of $0.15/kWh, it costs $5.40 per day.

Are space heaters expensive to run?

Space heaters can be expensive if used as a primary heat source. However, using a space heater to heat a single room while lowering the whole-house thermostat can actually save you money.

Space Heater Cost Calculator

Is your space heater driving up your electric bill? Find out exactly how much it costs to run per hour, day, and month based on its wattage and your local electricity rates.

Appliance Settings

Power Output

Unit

Hours per Day

Electricity Rate ($/kWh)

Room Size (sq ft) - OptionalJust for reference. A standard rule is ~20 BTU per sq ft.

Power Estimate: Your device uses approximately 1500 Watts (1.50 kW) when running.

Running Costs

Estimated Monthly Cost

$54.72

365 kWh consumed per month

Hourly Cost

$0.22

Daily Cost

$1.80

Solar Offset Needed

~ 7 Panels

☀️

*Assuming 400W solar panels producing ~60kWh/month each.

💡 How to use this calculator

Select your device: Choose whether you want to calculate costs for an Air Conditioner or a Space Heater.
Enter the power: Input your device's power rating. For ACs, this is typically in BTUs (e.g., 12,000 BTU for a 1-ton AC). For heaters, it is usually in Watts (e.g., 1500W).
Set the usage: Estimate how many hours per day the appliance runs.
Update your rate: Check your latest utility bill for your exact cost per kWh, or leave the default average rate.
View your results: The calculator instantly updates to show your estimated hourly, daily, and monthly costs!