How to Calculate Electricity Cost
What is Electricity Cost?
An electricity cost calculator determines the running cost of any electrical appliance based on its wattage, daily usage hours, and the local electricity tariff in cents or pence per kWh.
Formula
Step-by-Step Guide
- 1Energy (kWh) = Watts × Hours per Day ÷ 1,000
- 2Daily Cost = Energy (kWh) × Tariff Rate ($/kWh)
- 3Monthly Cost = Daily Cost × 30.44 days
- 4Annual Cost = Daily Cost × 365 days
Worked Examples
Frequently Asked Questions
What is Electricity Cost?
An electricity cost calculator determines the running cost of any electrical appliance based on its wattage, daily usage hours, and the local electricity tariff in cents or pence per kWh. Use this calculator for accurate, instant results.
How accurate is the Electricity Cost calculator?
The calculator uses the standard published formula for electricity cost. Results are accurate to the precision of the inputs you provide. For financial, medical, or legal decisions, always verify with a qualified professional.
What units does the Electricity Cost calculator use?
This calculator works with inches, dollars, kilowatts, watts. You can enter values in the units shown — the calculator handles all conversions internally.
What formula does the Electricity Cost calculator use?
The core formula is: Energy (kWh) = Watts × Hours per Day ÷ 1,000. Each step in the calculation is shown so you can verify the result manually.
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