The Energy Consumption Calculator turns an appliance wattage and usage pattern into kWh and running cost per day, month and year at your tariff. Quantity is included, so a group of identical devices can be assessed at once.
Energy Consumption Calculator (kWh & Cost Estimator)
Work out the energy an appliance uses and what it costs to run, including standby draw, quantity and a carbon estimate, broken down by day, month and year.
Appliance
Usage pattern
Rates
Results
--
per year
--
cost per year
Notes
About Energy Consumption Calculator (kWh & Cost Estimator)
Features
- Wattage x quantity x hours x days
- Daily, monthly and annual kWh
- Cost at your own tariff
- Per-device and whole-group figures
- Works for any appliance
How to Use
- Enter the appliance wattage and how many units there are.
- Set hours per day, days per month and your tariff.
- Read the kWh and cost figures.
Examples
Example: one 100 W device for 3 h/day over 30 days -> 9.00 kWh a month, $1.35 at $0.15/kWh, and $16.20 a year.
Benefits
- Makes standby and always-on loads visible in money terms
- Gives the input side of any replacement payback decision
Frequently Asked Questions
What does this calculator do?
Work out the energy an appliance uses and what it costs to run, including standby draw, quantity and a carbon estimate, broken down by day, month and year.
Is my data stored?
No. Everything runs in your browser; nothing is uploaded, saved or logged.