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NT-270 / Decision pack

Household energy-use worksheet

Understand a simple usage estimate from declared power and time.

Multiply declared watts by hours per day and days, convert watt-hours to kilowatt-hours and apply one entered unit rate. This simple model excludes standby variation, cycling, standing charges and tariff tiers.

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Editable .xlsxPDF guideNo macros

Start with the decision

What energy and usage cost follow from the entered appliance scenario?

Households reviewing their own electricity-use assumptions.

From input to next step.

  1. 01

    Use documented inputs

    Use a suitable appliance specification or measurement record; do not open equipment or make electrical changes.

  2. 02

    Keep units consistent

    Enter watts, hours per day from zero to 24, days and one cost per kWh. This is a usage scenario rather than a metered bill.

  3. 03

    Compare carefully

    Consider actual cycling and tariff structure separately. Ask a qualified professional about technical or safety questions.

A look inside

The example, in plain sight.

Fictional values from the workbook. Amounts are illustrative currency units, not a market rate or a customer result.

Appliance scenario
Scenario A
Watts
100
Hours per day
5
Days
30
Cost per kWh
0.25
Estimated kWh
15
Usage cost
3.75

Before you use the result.

  • Hours per day cannot exceed 24.
  • No current energy tariff is supplied.
  • Standing charges and variable appliance load are excluded.

A user-input energy estimate, not an electrical inspection, bill calculation or savings guarantee.

A few useful answers.

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What will I receive?

Each product includes a PDF guide, an editable Excel workbook, a fictional worked example, a blank worksheet with 50 prepared rows and a decision log. Working kits also include an implementation plan and an adaptable message. The exact file list is on each product page.

What software do I need?

A PDF reader and spreadsheet software that supports standard .xlsx formulas. The workbooks contain no macros or external data connections. Formula results depend on your inputs and your spreadsheet software recalculating them. No paid AI account is required.

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