Electricity Cost Calculator - Free Online Tool
Calculate the cost of running any electric device by day, month, or year.
Enter wattage, hours used, and your $/kWh rate.
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Frequently Asked Questions
Common questions about the Electricity Cost Calculator - Free Online Tool
Cost = kWh used × price per kWh. A 100W device for 10 hours = 1 kWh. At /bin/zsh.12/kWh = /bin/zsh.12.
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Sources & References
International System of Units (SI): energy, work and heat
Energy, work and heat is measured in the joule (J); 1 cal = 4.184 J. Conversions between SI and other units use exact, internationally agreed factors maintained by NIST.
International System of Units (SI)
Authoritative definitions for energy, work and heat, from the BIPM SI Brochure (9th edition), the defining reference for the SI.