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Electricity Cost Calculator

Calculate electricity consumption and electricity cost per hour, day, month and year quickly online.

Energy
Inputs

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Estimate how much electricity a device, usage pattern or typical household consumption costs per hour, day, month and year. It is especially useful for appliances, space heaters, refrigerators, computers, home office setups, kitchen devices, lighting, electronics and other power consumers.

Display currencyChoose the currency symbol for entered amounts and results. No exchange-rate conversion is applied.
W
You can often find the rated power on the label or data sheet.
hrs
Enter how many hours the device runs on a typical usage day.
Use 7 for daily use or often 5 for workday-based usage.
%
100% means the device draws its rated power for the full usage time. For cycling appliances such as refrigerators, lower values are more realistic.
$/kWh
Use your local variable tariff price per kWh. Enter the value from your own bill; no exchange-rate conversion is applied.
$
Optional fixed tariff component per month, such as a standing charge equivalent. Enter the local bill value.
FAQ

FAQ about Electricity Cost Calculator

How do I calculate electricity cost per hour?

Divide the device power in watts by 1000 and multiply the result by the electricity price per kWh. This gives you the cost per hour.

How much does a 1000 watt device cost per hour?

A 1000 watt device uses 1 kWh when running for one hour. The cost therefore equals the electricity price per kWh.

How do I calculate electricity cost in money terms?

Multiply electricity consumption in kWh by the electricity price per kWh. If there is a monthly base fee, include that as well.

How do I calculate the electricity use of a device?

Divide the power in watts by 1000 and multiply the result by usage time in hours. This gives you electricity consumption in kWh.

How much electricity does a device use per day?

That depends on power and usage time. Power in kW multiplied by daily operating hours gives consumption in kWh per day.

Why is the base fee important in an electricity tariff?

The base fee applies regardless of actual usage. With low consumption, it can make up a surprisingly large share of total cost.

Which inputs have the biggest effect on the result?

The main drivers are device power in watts, daily usage time, usage days per week and the electricity price per kWh. A high monthly base fee can also increase total cost noticeably.

Why is my real electricity bill different from the calculator?

Real consumption may differ, tariffs may include additional details, prices can change and many devices do not run continuously at full power.