room heating cost

Estimate the running cost of an appliance from its wattage, usage hours and electricity rate generally.

About room heating cost

Energy used = watts × hours ÷ 1,000 (kWh), then monthly cost = daily kWh × days × the electricity rate. Small wattage differences compound fast on devices used daily.

Formula

Cost

Cost = watts × hours ÷ 1000 × rate

Worked example

With the default values below, room heating cost returns Monthly Cost of $13.50. Change any input above and every figure here is recalculated in your browser.

Inputs used

Power drawaccepts 1–100,000 W: 1,500 W
Use per dayaccepts 0–24 hours: 2 hours
Days per monthaccepts 1–31: 30
Electricity rateaccepts 0.01–1 per kWh: 0.15 per kWh

Results

Monthly Cost: $13.50
Yearly Cost: $162.00
Daily Cost: $0.45
Monthly Energy Use: 90.00

Step by step

1Values used
2Cost
3Monthly Cost= 13.50
4Yearly Cost= 162.00
5Daily Cost= 0.45
6Monthly Energy Use= 90.00

Assumptions and limits

The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax, fees or charges 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.
Estimate — actual draw varies by mode and usage.

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

Estimate — actual draw varies by mode and usage.

Frequently Asked Questions

Is my actual rate included?

No — enter the rate from your latest utility bill for accuracy.

How accurate is this estimate?

Rates are approximate reference values. Local rates, exemptions and rules can differ, so treat the output as a planning figure only.