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WattBills.com

Usage Comparator

Compare two usage scenarios side by side.

Inputs

Inputs and assumptions

Nameplate watts for Usage Comparator.

How many of this device you run.

Hours per day

Fridges run 7; laundry may run 2-3.

Compressors and thermostats cycle; a fridge averages ~40%.

Rate

Result

Cost per year
$465.38
Energy per year
2,738 kWh
Share of average US home
26.0%
Cost per running hour
$0.255
Cost per day
$1.28
Energy per day
7.5 kWh
Cost per month
$38.25
Screening tool. Verify your utility tariff and equipment specs before deciding.

Frequently asked questions

How do I compare two scenarios?

Enter watts, hours, and rate for each. Identical math isolates the decision to behavior or equipment.

What should I hold constant?

Rate and days per week. Change one variable at a time for honest comparisons.

Can I compare fuels?

Convert each to cost per unit of service, like dollars per hot shower or per mile, before comparing.

Why show both kWh and dollars?

kWh reveals efficiency; dollars reveal the bill. Efficient but heavily used gear can still cost more.

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Workspace

Every result shows its math: your inputs, the formula, the numbers.

Save this calculation to return to the inputs, result, and report from your private workspace.

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