About WattCostGuide

What this site does

WattCostGuide is a practical electricity cost calculator site for common household appliances. The goal is to make appliance running costs easier to estimate using three numbers: watts, hours used, and electricity rate.

How estimates are calculated

The site uses the standard kilowatt-hour cost formula. Each calculator lets you change the wattage, daily runtime, and price per kWh so the result can better match your own appliance and utility bill.

Cost = Watts / 1000 x Hours Used x Electricity Rate

Read the full methodology and references

Transparent Every formula is shown Calculators use visible inputs so readers can adjust assumptions instead of relying on a hidden estimate.

Practical Built for quick comparisons Daily, monthly, yearly, and kWh estimates help compare appliances with different wattages and runtimes.

Editable Your numbers matter most Default wattage and rate values are starting points, not replacements for a product label or utility bill.

Maintained Corrections are welcome Readers can send appliance wattage suggestions or corrections through the contact page.

Important limitations

Estimates may differ from actual bills because appliances cycle on and off, utility rates vary, and bills can include taxes, fees, demand charges, delivery charges, or time-of-use pricing.

Editorial approach

Pages are written to answer practical household questions first: how many watts an appliance may use, how runtime changes cost, and which assumptions should be replaced with a reader's own numbers. When a calculator uses a default value, the page also shows the wattage range and formula so the estimate can be checked or adjusted.

WattCostGuide favors simple explanations over exact claims because home electricity use varies by model, settings, climate, maintenance, and utility rate. Corrections and source suggestions are welcome through the contact page.