How do I calculate appliance electricity cost?

Multiply watts by hours used and days used, divide by 1,000 to get kWh, then multiply by your price per kWh. The calculator does this for each appliance and totals the month.

Where do I find my electricity rate?

Look at your utility bill for price per kWh or divide the energy-related bill amount by the kWh used. If you have time-of-use pricing, calculate peak and off-peak appliances separately.

Why can my bill be higher than the appliance estimate?

Bills can include fixed charges, delivery charges, taxes, demand charges or tiered rates. The calculator estimates usage-based energy cost from the rate you enter.

Electricity Cost Calculator

Estimate appliance electricity cost from wattage, hours per day, days per month and your local price per kWh.

Monthly appliance electricity cost

Use the electricity rate from your latest utility bill or provider account.

Rate ($/kWh)

Appliance

h/day

days/month

Appliance

h/day

days/month

Appliance

h/day

days/month

Calculate Appliance Electricity Cost

English search results for this topic center on appliance running cost: watts, hours used, price per kWh and monthly or yearly cost. The calculator keeps those inputs visible so you can estimate a refrigerator, TV, washer, heater, computer or any other appliance from your own utility rate.

Use your effective rate

Your bill may include delivery charges, taxes, minimum charges or time-of-use rates. For budgeting, use the effective $/kWh from the bill when possible, not just a headline supply rate.

Electricity Cost Formula

k W h = \frac{w a tt s \times h o u r s p er d a y \times d a y s}{1000}

cos t = k W h \times p r i ce p er k W h

Watts come from the appliance label or manual.
Hours per day should reflect actual runtime, not just plugged-in time.
Days per month lets occasional devices stay separate from always-on loads.

What Competitor Pages Usually Include

Need	How this page handles it
Appliance running cost	Watts, hours, days and $/kWh inputs
kWh to dollars	Monthly kWh multiplied by your electricity rate
Bill planning	Itemized appliance list plus a monthly total
Rate caveat	Notes about effective rates and time-of-use billing

Frequently Asked Questions

Sources and References

Calculations are based on the listed reference sources. Links open in a new tab.

Updated: June 2, 2026

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