Energy Cost Calculator

Enter an energy usage in kWh, a rate per kWh, and any fixed service fee to calculate the total electricity cost.

How to Use the Energy Cost Calculator

Enter an energy figure in kWh — copied straight off a utility bill, or produced by another calculator — along with a rate per kWh and, if it applies, a flat monthly service fee. Usage cost and total cost both update immediately.

This is the reverse-direction tool from the Electricity Bill Calculator and the Energy Consumption Calculator. Those two build a kWh figure up from the ground: appliance wattage, hours run, days in the period. This one assumes that work is already done — you're holding a kWh number, whether it came from an actual bill or from one of those calculators — and just wants the cost math finished:

Usage Cost = Energy Used (kWh) × Rate per kWh
Total Cost = Usage Cost + Fixed Monthly Service Fee

The fixed fee field exists because a lot of real bills aren't pure usage pricing. Utilities routinely tack on a flat connection or service charge — sometimes called a customer charge, a standing charge, a basic service fee — that shows up regardless of how much electricity actually got used that month. A calculation that only multiplies kWh by rate misses that entirely and will always undershoot the real total by whatever that flat fee happens to be. Leave it at zero for a pure per-kWh estimate; fill it in when reconciling against an actual bill that lists one.