# Electricity Calculator Calculate electricity costs based on power consumption and usage time > Canonical page: https://elysiatools.com/en/tools/electricity-calculator - **Category:** Math & Numbers - **Keywords:** electricity, power, energy, cost, calculator, kwh, bill, consumption, electricity calculator ## Overview The Electricity Calculator is a straightforward tool designed to help you estimate your energy expenses by calculating the total cost based on device power consumption, daily usage duration, and your local electricity rate. ## Inputs - **Power Consumption** (number): Enter power in watts (W) - **Hours Per Day** (number): Enter hours of usage per day - **Number of Days** (number): Enter number of days - **Electricity Rate** (number): Enter rate per kWh - **Currency** (select) ## When to use - Estimating the monthly operating cost of a new household appliance. - Comparing energy efficiency between different electronic devices. - Budgeting for electricity bills by forecasting consumption patterns. ## How it works - Enter the power consumption of your device in watts (W). - Specify how many hours per day the device is typically in use. - Input the number of days and your local electricity rate per kilowatt-hour (kWh). - Select your preferred currency to receive an instant cost breakdown. ## Use cases - Calculating the monthly cost of running a space heater or air conditioner. - Determining the energy impact of leaving a desktop computer running 24/7. - Evaluating the cost-effectiveness of upgrading to energy-efficient LED lighting. ## Frequently asked questions ### How is the electricity cost calculated? The tool calculates total energy in kWh by multiplying watts by hours and days, then dividing by 1,000, and finally multiplying by your rate per kWh. ### Where can I find my electricity rate? You can find your rate per kWh on your most recent utility bill or by checking your energy provider's website. ### Does this tool account for standby power? No, this calculator only accounts for the power consumption value you provide. If you want to include standby power, you must calculate it separately or use the average wattage while the device is plugged in. ### Can I calculate costs for multiple devices? This tool calculates one device at a time. To find the total for multiple devices, calculate each one individually and sum the results. ### Is the result accurate for all regions? 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