Working out my average daily electricity usage.

nictu

Hi,
I'm trying to work out my average electricity usage from my estimated annual usage, although I'm not sure what to do. I have tried
doing my estimated annual usage divided by 365 then divide that answer by 1000 ( because 1000 Watts = 1kwh)
e.g. 2415 / 365 = 6.61 
6.61 / 1000 =0.00661
I'm not sure this is right though.
Many Thanks,
nick.

QrizB

nictu said:

Hi,
I'm trying to work out my average electricity usage from my estimated annual usage, although I'm not sure what to do. I have tried
doing my estimated annual usage divided by 365 then divide that answer by 1000 ( because 1000 Watts = 1kwh)
e.g. 2415 / 365 = 6.61 
6.61 / 1000 =0.00661
I'm not sure this is right though.
Many Thanks,
nick.

Your annual usage is already in kWh. To calculate kWh per day:
2415 kWh / 365 days = 6.61 kWh/day.

If you want to know your average electricity load in watts, you need to convert from days to hours and from kW to W:
6.61 / 24 = 0.275 kWh / hr
0.275 * 1000 = 275 watts.

So, your average power use is 275 watts. Is that the number you're looking for?

matelodave

You dont need to divide by 1000 because your estimate is already in kwh.

from your calculation 2415/365 = 6.61kwh/day or about £2 a day at 30p/kwh

nictu

Ah Ha !
That's great, many thanks for your help.
Nick.

Ectophile

There are 24 hours in a day.

So if you use 2415 kWh per year, then that's 2415/365 = 6.61 kWh per day.

Divide it down again, and 6.61/24 = 0.276 kWh per hour.  In other words, 0.276 kW, or 276W average.

[Deleted User]

Hi,

you'd be better working with actual annual usage rather than estimated annual usage to get a true figure.

Have a look at bills/statements a year apart based on actual readings.

Get into the habit of taking regular readings, at least monthly, then you can track changing usage due to season/weather/heating, set up a wee spreadsheet for easy comparison.

nictu

Thank Frugalmacdugal.