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Monthly Electricity Cost

Free Monthly Electricity Cost calculator with clear step-by-step results.

About Monthly Electricity Cost

Estimate the energy use and cost of monthly electricity cost.

Formula

Formula

kWh/day = watts ÷ 1000 × hours

Worked example

With the default values below, Monthly Electricity Cost returns Energy per Day of 5.00. Change any input above and every figure here is recalculated in your browser.

Inputs used

Power (W)minimum 0
1,000
Hours per dayminimum 0
5
Cost per kWhminimum 0 $
0.15 $

Results

Energy per Day
5.00 kWh
Monthly Cost
$22.50
Annual Cost
$273.75

Step by step

  1. 1Values used
  2. 2Formula
  3. 3Energy per Day= 5.00 kWh
  4. 4Monthly Cost= $22.50
  5. 5Annual Cost= $273.75

Assumptions and limits

  • The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax or compounding frequency into account.
  • Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
  • Rates vary by region and tariff.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Rates vary by region and tariff.

Frequently Asked Questions

How does this calculator work?

Estimate the energy use and cost of monthly electricity cost.

Why does this matter?

Understanding consumption is the first step to reducing it.

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