Peak Demand Charge Calculator
Use the Peak Demand Charge Calculator. Enter Peak demand kW and Demand rate per kW for a clear result, formula explanation, and practical planning checks.
Peak Demand Charge measurements
Enter your values, then calculate.
Result
How to calculate peak demand charge
This calculator finds peak demand charge by multiplying peak demand (in kW) by the utility's demand rate — many commercial electricity bills include this charge separately from regular energy usage.
How the calculation works
Demand charge = Peak demand (kW) × Demand rate per kW.
Example
A peak demand of 60 kW at a $14/kW demand rate: 60×14 = $840.
Frequently asked questions
How is Result calculated?
Result = [Peak demand kW] × [Demand rate per kW].
Is the Peak Demand Charge Calculator free to use?
Yes — every calculator on Simple Calculator Tools is free, runs in your browser, and does not require an account.
Peak Demand Charge Calculator
Demand charge = Peak demand (kW) × Demand rate per kW.
Let's understand your peak demand charge result.
Calculate a result above and this guide will help you interpret it using this calculator's own formula and explanation.
Pro Tips for Peak Demand Charge
- Demand charges are based on your highest sustained draw during the billing period (often measured over a 15-30 minute window), not your average usage — a single spike can set this charge for the whole month.
- Staggering the startup of large equipment (rather than starting everything simultaneously) can reduce peak demand without necessarily reducing total energy use.
Common Peak Demand Charge Mistakes to Avoid
- Confusing demand charges (based on peak kW) with energy charges (based on total kWh consumed), which are billed separately and respond to different usage patterns.
When to Use This Calculator
This calculator finds peak demand charge by multiplying peak demand (in kW) by the utility's demand rate — many commercial electricity bills include this charge separately from regular energy usage.