The things that use the most electricity in a house are furnace, electric furnace or natural gas furnace, electric stove, electric oven, central air conditioner, electric hair dryer, electric space heaters, baseboard heaters that run off electric, window air conditioners.
Even your electric dryer uses a lot of electricity and can cost 50 cents to run for a drying of clothes.
Other things that use the less electricity are refrigerator, computers, cell phone chargers, TV, LED lights etc.
You can use a meter that you buy to plug into the wall and plug your device into the meter and it will tell you what amount of electricity that device is using.
If you use an engine block heater that also uses a lot of electricity and can use as much as 1,500 watts of electricity per hour.
A space heater can cost as much as 20 to 30 cents per hour of run time and just one electric space heater can use as much as $100.00 per month in electricity alone.
Electric space heaters are not the most efficient way of heating a house and natural gas or propane is more efficient and cheaper to heat with.