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Calcimator

Electricity Rate Analysis Calculator

Compare flat, TOU, and demand charge rate structures.

InputsLoading live data…

kWh
$/kWh
$/kWh
$/kWh
%
$/kW
kW
$

Results

Best Rate (1=Flat, 2=TOU, 3=Demand)

1

Annual Savings vs Worst

$1,800.00

≈ 14 pairs of sneakers

Flat Rate Bill$255.00
TOU Bill$275.00
Demand Charge Bill$405.00
Flat Vs Tou-20
Flat Vs Demand-150
How to Use This Calculator
  1. Enter Monthly Usage, Flat Rate, and TOU On-Peak Rate.
  2. Set TOU Off-Peak Rate, Peak Usage %, and Demand Charge.
  3. Adjust Peak Demand, Fixed Charge as needed.
  4. Review Best Rate (1=Flat, 2=TOU, 3=Demand) and Annual Savings vs Worst ($).
  5. Use Flat Rate Bill ($) and TOU Bill ($) to inform your decision.

How the result changes with Flat Rate

Flat RateBest Rate (1=Flat, 2=TOU, 3=Demand)Annual Savings vs Worst
0.11$1,800.00
0.212$3,672.00
0.342$6,912.00
0.462$9,600.00

What each input means

Monthly Usage
Average monthly electricity consumption.
Flat Rate
Standard flat rate per kWh.
TOU On-Peak Rate
Time-of-use on-peak rate.
TOU Off-Peak Rate
Time-of-use off-peak rate.
Peak Usage %
Percentage of usage during peak hours.
Demand Charge
Monthly demand charge per kW of peak demand.
Peak Demand
Your highest 15-minute demand in the month.
Fixed Charge
Monthly fixed service charge.

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Monthly Usage = 2000, Flat Rate = 0.12, TOU On-Peak Rate = 0.22, TOU Off-Peak Rate = 0.07 = 8 input(s) provided
  2. Calculate Best Rate
    1 = 1
  3. Calculate Annual Savings vs Worst
    Annual Savings vs Worst = round((max(flatBill
    1800 = $1,800
  4. Calculate Flat Rate Bill
    Flat Rate Bill
    255 = $255
  5. Calculate TOU Bill
    TOU Bill
    275 = $275

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