How to use this calculator
Estimate how much electricity an appliance uses and what it may cost.
How the calculation works
- Enter wattage.
- Set hours per day and days.
- Add your electricity price per kWh.
Formula
kWh = watts / 1000 x hours x days
Example
A 1,000 W appliance for 2 hours daily over 30 days uses 60 kWh.
Understanding your result
Use the output as a practical starting point, then review it before using it in an important workflow.
Assumptions and limitations
- Actual usage varies by appliance behavior and utility billing.
- Use your own local electricity price.
Frequently asked questions
Does this require an account?
No. The core tool works without creating a Tool2Do account.
Is my input included in share links or analytics?
No. Tool2Do share actions use the tool page URL and safe metadata, not private values or uploaded files.