Power and energy

Electricity energy and demand cost calculator

Estimate a simple electricity bill from consumption, billing demand, rates, fixed charges and a tax or levy percentage.

Calculate

Energy and demand charges
Display only; no currency conversion is performed.
kWh
USD/kWh
kW
Billing demand may differ from the measured peak because of a tariff ratchet or adjustment.
USD/kW
Other bill components
USD
USD
%

Worked example

Estimated bill total

18,860.22 USD

Energy charge
15,625.00 USD
Demand charge
2,838.56 USD
Fixed charges
45.00 USD
Other charges
0.00 USD
Tax or levy on subtotal
351.66 USD
Effective all-in rate
0.0754 USD/kWh

Single-block arithmetic from the entered billing demand and charges. It does not reproduce tariff ratchets, time-of-use periods, minimum bills or power-factor adjustments.

Method and assumptions

Formula

Subtotal = kWh × energy rate + billing kW × demand rate + fixed + other charges; total = subtotal × (1 + tax %)

This is a single-block estimate. Use the billing demand and rates actually defined by the tariff for the same billing period.

Limits of this result

  • This does not model time-of-use blocks, demand ratchets, minimum bills, coincident peaks, power-factor penalties, credits or currency conversion.
  • The tax/levy percentage is applied to the complete entered subtotal; enter zero and add the billed amount under other charges when that is not correct.
  • A utility invoice or current tariff remains the authority for billing.

Technical sources

  1. Understanding Your Electricity BillsUS Department of Energy · 2021
  2. Evaluating Your Utility Rate OptionsUS Department of Energy · updated 2020-04-24

Put the value to work

Read the related engineering guidance, or carry this task into System Builder to identify the signal path and EpiSensor products.

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