Practical calculators, converters, and readable reference pages.
Independent public resource
Choose the calculator path when your inputs are ready. Choose the guide path when the missing step is wattage, runtime, measured kWh, or the rate from an electric bill.
Start here
When wattage, daily runtime, and rate are ready, this calculator turns them into daily, monthly, and yearly usage-cost estimates for one appliance.
Home energy
What it shows
Estimate the daily, monthly, and yearly electricity cost of an appliance from its wattage, usage hours, and electricity rate.
Best for
Comparing the running cost of heaters, fans, computers, kitchen appliances, and other devices before you buy or leave them on every day.
Input help
These guides are grouped around the number that blocks the estimate. Pick the missing input first, then return to a calculator with a clearer assumption.
This keeps the site path simple: calculate when the numbers are ready, read when an input needs checking.
Site information
The site includes privacy, disclaimer, and contact pages because calculators are more useful when assumptions, correction options, and estimate limits are easy to check.