Your meter should give you kwh.

This is kw * hours.  So 100w over 24 hrs is (24 * 100 )/1000 = 2.4 units per day = 2.4 kwh per day.

After that you then apply a Tariff based on who your provider is.  And VAT if you're in The UK.  And that's the Electrical Cost for adding your Miner.

For example:

Antminer s3 at 370w is ( 370w * 24 )/1000 = 8.88 units per day.

As long as you make enough BTC to pay off your energy bill you tick over.  Profit is when there is cash left at the end of the month after electricity.  Really you want profit if you use bigger miners, but that's quite hard with the current BTC slump.


If your Electricity Provider is not the cheapest one you can get then shift to a cheaper one.  You won't be able to wing it, as mining uses A LOT of juice.



There are 2 ways to see what your miner drains at the wall per day.  One is to work out how many units your place uses normally per day before you switch it on.  The other is to use a plug-in watt-meter.

The best quality watt meter you will have in the house is most likely the Electricity Meter that came with house.  So I prefer to count units, and use my watt meter as a more general indicator.