Electricity Calculator
Enter voltage, current, daily hours and tariff to estimate power, monthly kWh and monthly electricity cost.
Input Data
Results
1,100
99
148.5
At a glance:Power W = V × A. Monthly kWh = (W ÷ 1000) × hours/day × days/month. Monthly cost = kWh × price per kWh.
Formula
watts = volts × amps.
kwhPerMonth = (watts ÷ 1000) × hoursPerDay × daysPerMonth.
costPerMonth = kwhPerMonth × pricePerKwh.
How to Use
- Enter voltage, current, daily hours and days per month.
- Enter the price per kWh to get power, energy and cost.
FAQ
Where do I find voltage/current?
They are on the appliance nameplate, e.g. 220V 5A; if only power (W) is shown, divide by voltage to get current.
Why is this an estimate?
Real usage varies with load; this assumes steady power and is good for rough budgeting.
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References
Content reviewed by the Calculatorism editorial team. Results are for reference only; please refer to the relevant authorities for the official figures.