Add up your appliance electricity costs
Give each appliance or group its own power draw and daily hours. Add separate rows for devices that run on different schedules, then price the total electricity use.
Your electricity worksheet
Enter average input watts during the hours shown, per item. The worksheet adds those energy amounts; it does not apply another duty-cycle reduction.
Replaces the current rows with illustrative inputs. Your electricity price and repeat-days setting stay as entered.
How the total is calculated
Daily kWh for a row = quantity × watts per item × hours ÷ 1,000. Add the rows, multiply by the electricity price in dollars per kWh, then multiply by the selected repeat-days. The period is exactly the number of days entered, rather than a 30.44-day monthly equivalent.
Different appliances can operate at the same time. Each row has a maximum of 24 hours per day; the hours across different devices do not have to add up to 24.
For one variable-speed pool pump, use a separate row with Quantity 1 for each operating period. Pair average input watts with that period's hours, and keep this one pump's time blocks non-overlapping and within 24 hours in total. Each row repeats for the same number of days. See the pool-pump schedule example and measurement guidance.
Worked example: fans and lights
With illustrative inputs, two 60W fans used for eight hours consume 0.96 kWh. Two separate 10W light kits used for four hours add 0.08 kWh. Together they use 1.04 kWh per day. At an illustrative 20 cents/kWh, that is $0.208 per day before rounding, or $6.24 for exactly 30 days. These are arithmetic examples, not measurements of a particular fan or light.
Choose power readings and schedules that belong together
For steady draw, use operating watts and the hours the device runs. For cycling equipment, use average watts over the entire entered time window, or use the energized watts with only the hours actually energized. Do not reduce an already averaged reading again. If you have measured kWh instead, the single-appliance calculator accepts that energy directly.
Watts are per item. If a reading covers a complete group, enter it once with quantity 1. Avoid adding a group reading and its individual devices, or overlapping active and standby hours for the same device. Split changing fan speeds into non-overlapping time blocks using the watts specified or measured at each speed.
For a ceiling fan, add a light row only if the motor reading excludes the light kit. Give the lights their own quantity and hours; they can be on at the same time as the fan. If your measurement already includes the lights, do not add them again.
ENERGY STAR’s ceiling-fan efficiency metric is a weighted airflow rating in CFM/W, not electrical watts for a selected speed. Use the input watts for your model and setting; the worksheet supplies no assumed speed ratios.
What this estimate covers
The result prices the electrical energy in the entered schedules. It does not predict a complete utility bill or assess wiring, circuit capacity or simultaneous peak demand. Fixed charges, taxes not included in your input rate, tier changes and time-of-use prices need separate treatment.
A fan and an air conditioner do different jobs. ENERGY STAR explains that ceiling fans cool people, not rooms. This worksheet does not infer how much air-conditioner use a fan will avoid.
Rate presets come from EIA residential electricity-price data; the power, quantity and hours are your inputs. See our calculation methodology for units, assumptions and the limits of average prices.