Appliance Wattage & Energy Calculator
Result
Appliance Wattage & Energy Calculator The Appliance Wattage Calculator works out how much energy an appliance uses and what it costs to run. Enter the appliance's power rating in watts, how many hours you use it per day, and your electricity price. The fo — free online calculator.
Formula
- Appliance energy and cost calculator. This page explains the stated calculation method and provides a worked example.
- The main inputs are Power, Hours used, Electricity price per kWh. Enter them in the units and format shown in the calculator.
- Use the units, labels and assumptions shown beside each input so the formula is applied consistently.
- Changing any input above recalculates the result with the same calculation engine used by this page.
Example: Appliance Wattage & Energy
- Power: 1000
- Hours used: 2
- Electricity price per kWh: 0.15
A 1,000 W appliance used 2 hours consumes 2 kWh; at 0.20/kWh it costs 0.40.
Sample result: Calculating…
Frequently asked questions
What does the Appliance Wattage & Energy calculate?
Actual consumption can differ when an appliance cycles or changes power level.
Which values should I enter?
Enter Power, Hours used, Electricity price per kWh using the units and format shown beside each field.
What formula does this calculator use?
The calculator uses the following relationship: Energy (kWh) = Watts × Hours ÷ 1000; Cost = Energy × Price per kWh.
Why might my result differ from another source?
Results can differ when another source uses different units, rounding rules, conventions or assumptions. Compare the inputs and definitions before comparing results.
Does the result update automatically?
Yes. Changing an input updates the result using the same calculation engine shown on this page.