How much does it cost to run a portable electric space heater?
A typical portable electric space heater draws about 1500 watts. Used 5 hours a day, that works out to roughly $1.28 per day, $12.75 per month, and $153.00 per year on an average electricity rate of 17¢ per kWh. Portable space heaters typically draw 750-1500W and are used seasonally for localized warmth.
Portable Electric Space Heater running cost calculator
- Per day
- $1.28
- Per month
- $12.75
- Per year
- $153.00
- CO₂ / year
- 360 kg
Based on 900 kWh per year. Adjust the price per kWh to match your latest electricity bill for an exact figure.
The number that matters most is your own electricity rate. Rates range from under 11¢ per kWh in some regions to over 30¢ in others, so the same portable electric space heater can cost two or three times as much depending on where you live. Enter your exact rate in the calculator above to get a figure tailored to your bill.
Heating appliances like the portable electric space heater are usually seasonal, so your real annual cost depends heavily on your climate and how many months you run it. The figures here assume average year-round use — if you only switch it on during the coldest part of the year, scale the monthly cost by the number of months you actually use it.
At 1500 watts, the portable electric space heater is a high-draw appliance — the kind that can briefly become the single biggest load in your home while it runs. On a time-of-use tariff, shifting it to off-peak hours is often the easiest way to cut its cost without using it any less.
Over a full year this portable electric space heater uses about 900 kWh of electricity and is responsible for roughly 360 kg of CO₂ emissions on an average grid. Since it is used only part of the year, your real footprint scales with the season — the annual figure assumes a typical usage pattern.
To put the draw in everyday terms, one hour of running this portable electric space heater uses about as much electricity as charging a smartphone 125 times. It is a rough comparison, but it makes an abstract wattage figure easier to picture.
If this portable electric space heater is one you use daily, even small efficiency gains compound. Cutting its usage or wattage by 20% would save around $30.60 every year — money that an efficient replacement can recover over its lifetime.
Frequently asked questions
- How much does it cost to run a portable electric space heater per hour?
- At 1500 watts and a 17¢/kWh rate, a portable electric space heater costs about $0.26 per hour to run.
- How much electricity does a portable electric space heater use per month?
- Running 5 hours a day, a portable electric space heater uses roughly 75.0 kWh per month, costing about $12.75.
- How many kWh does a portable electric space heater use per year?
- Used 5 hours a day for 120 days a year, a portable electric space heater consumes about 900 kWh annually — that is the figure your electricity rate is multiplied by to get the $153.00 yearly cost.
- Is a portable electric space heater expensive to run?
- Yes — at around $153.00 per year, a portable electric space heater is one of the more costly appliances to run, so efficiency upgrades pay off quickly.
- How much CO₂ does a portable electric space heater produce?
- On an average grid, a portable electric space heater used this much is responsible for roughly 360 kg of CO₂ per year. The exact figure depends on how clean your local electricity supply is.
- How can I reduce my portable electric space heater running costs?
- Use it during off-peak hours if your utility offers time-of-use pricing, reduce daily run time, and consider an ENERGY STAR rated portable electric space heater, which uses less power for the same job.