Electricity use & cost
Estimate repeated equipment energy use and cost over a period.
How this works
kWh = watts/1000 × daily hours × days × duty fraction; multiply by your unit rate.
Example
Using the example inputs, period energy cost is 18 currency.
- Equipment input power
- 1000 W
- Operating hours per day
- 3 hours
- Days in period
- 30 days
- Duty cycle while switched on
- 100 %
- Energy price
- 0.2 currency/kWh
- Period energy cost
- 18 currency
Scope and assumptions
Excludes fixed service charges, demand charges and unentered tier/time-of-use rates.
OpenStax mathematics reference