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Calculators · Free

Measured appliance energy cost

Estimate consumption from measured average real power.

01Enter your values

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Energy is watts × operating hours × days / 1000. Multiply by your marginal price per kWh. Enter average real power over the counted operating hours.

Example
W
h

How it works

Estimate consumption from measured average real power.

kWh=W×h×days/1000; cost=kWh×tariff

Runs in your browser

Discovery source

Your data stays yours

Inputs are processed on this page and are never sent to a server.

About this tool

Estimate consumption from measured average real power.

Energy is watts × operating hours × days / 1000. Multiply by your marginal price per kWh. Enter average real power over the counted operating hours.

Use tool ↑

How to use it

  1. Enter your values

    Measured average power · Operating hours per day · Days · Price per kWh

  2. Calculate / generate

    Estimate consumption from measured average real power.

  3. Result

    Energy cost: 6 currency units Period energy: 24 kWh Daily energy: 0.8 kWh

Calculation method

  1. Energy is watts × operating hours × days / 1000.
  2. Multiply by your marginal price per kWh.
  3. Enter average real power over the counted operating hours.
kWh=W×h×days/1000; cost=kWh×tariff
Example scenario

Measured appliance energy cost

Measured average power
100 W
Operating hours per day
8 h
Days
30
Price per kWh
0.25
Result
Energy cost: 6 currency units
Period energy: 24 kWh
Daily energy: 0.8 kWh

Frequently asked questions

Limits and key assumptions

Not a complete bill: fixed fees, taxes and tiered/time-varying tariffs are excluded. Volts × amps may be apparent power; do not substitute it without power-factor knowledge.

Where does my data go?

Calculations run on your device. Form inputs are not sent to a server.

Terms and definitions

Enter your values

Measured average power

Enter average real power over the counted operating hours.

Enter a numerical value for this quantity. Use the unit shown beside this field. W

Minimum: 0 · Maximum: 1000000000 W

Operating hours per day

Energy is watts × operating hours × days / 1000.

Enter a numerical value for this quantity. Use the unit shown beside this field. h

Minimum: 0 · Maximum: 24 h

Days

Energy is watts × operating hours × days / 1000.

Enter a numerical value for this quantity.

Minimum: 0 · Maximum: 366000

Price per kWh

Multiply by your marginal price per kWh.

Enter a numerical value for this quantity.

Minimum: 0 · Maximum: 1000000

Result

Result

Energy is watts × operating hours × days / 1000. Multiply by your marginal price per kWh. Enter average real power over the counted operating hours.

Calculated from your entries using the method below.

Energy cost

Energy is watts × operating hours × days / 1000.

Calculated from your entries using the method below.

Period energy

Energy is watts × operating hours × days / 1000.

Calculated from your entries using the method below.

Daily energy

Energy is watts × operating hours × days / 1000.

Calculated from your entries using the method below.

Value

Energy is watts × operating hours × days / 1000. Multiply by your marginal price per kWh. Enter average real power over the counted operating hours.

Calculated from your entries using the method below.

Unit

Energy is watts × operating hours × days / 1000. Multiply by your marginal price per kWh. Enter average real power over the counted operating hours.

Calculated from your entries using the method below.

Common mistakes and quick fixes

Limits and key assumptions

Mistake: Treating a result as valid outside the described scope.

Fix: Not a complete bill: fixed fees, taxes and tiered/time-varying tariffs are excluded. Volts × amps may be apparent power; do not substitute it without power-factor knowledge.

Limits and key assumptions

  • Not a complete bill: fixed fees, taxes and tiered/time-varying tariffs are excluded. Volts × amps may be apparent power; do not substitute it without power-factor knowledge.
  • Displayed results may be rounded; rounding does not add measurement precision.