Electricity cost of mining I've checked with my electricity provider, and I have been told the following:

Unit Rate (per kWh) = 0.1399USD
Standard Charge (per day) = 0.1645USD


While mining, if my computer is using 100w (which is a reading my electric monitor is giving me).

How do I work out how much this miner is costing me per hour in terms of electricity usage?
Basic Algebra 101:

100 W = 0.1 kW


so

0.1 (kW) * 0.1399 (USD/kWh) = ~$0.014 (USD/hour)


or

0.1 (kW) * 24 (h/Day) = 2.4 kWh/Day

2.4 (kWh/Day) * 0.1399 (USD/kWh) = $0.3358 (USD/Day)