Peak vs Off-Peak Electricity Cost Calculator

Compare Time-Of-Use (TOU) electricity pricing tiers and calculate monthly financial savings by shifting heavy appliance usage.

  • 100% free
  • Private in browser
  • No signup
  • No watermarks
Current Monthly Bill ($)
169.6
Optimized Monthly Bill ($)
151.2
Monthly Savings ($)
18.4
Annual Projected Savings ($)
220.8

Rate this tool

Be the first to rate — helps others and improves this page.

About Peak vs Off-Peak Electricity Cost Calculator

Compare Time-Of-Use (TOU) electricity pricing tiers and calculate monthly financial savings by shifting heavy appliance usage. Enter On-Peak Rate, Off-Peak Rate and Total Monthly Usage and the tool works out Current Monthly Bill, Optimized Monthly Bill and Monthly Savings straight away. Everything runs in your browser, so your data never leaves your device.

How to use Peak vs Off-Peak Electricity Cost Calculator

  1. Enter On-Peak Rate, Off-Peak Rate and Total Monthly Usage.
  2. Adjust the remaining options (Peak Usage Percentage and Usage Shifted to Off-Peak) to match your case.
  3. Read Current Monthly Bill, Optimized Monthly Bill and Monthly Savings in the results panel — copy or download what you need.

Key features

  • Shows Current Monthly Bill ($)
  • Shows Optimized Monthly Bill ($)
  • Shows Monthly Savings ($)
  • 5 adjustable inputs, results update as you type
  • No signup, no limits

Frequently asked questions

Is this calculation free and private?
Yes, 100% of calculations execute locally in your web browser. No inputs or personal data are stored or transmitted.
What does the Peak vs Off-Peak Electricity Cost Calculator give me?
It works out Current Monthly Bill, Optimized Monthly Bill, Monthly Savings and Annual Projected Savings, updating live as you change the inputs.
What do I need to enter?
Just On-Peak Rate, Off-Peak Rate, Total Monthly Usage, Peak Usage Percentage and Usage Shifted to Off-Peak. Every field has a sensible default you can start from.
Is my data uploaded anywhere?
No. The calculation runs in your browser with JavaScript — nothing you type is sent to a server or stored.
Does it work on a phone?
Yes. The layout adapts to small screens and needs no app or signup.

Related In-Depth Guides

Learn practical workflows, real-world examples, and expert tips in our comprehensive guides:

Home & Energy · 5 min read

Time-of-Use (TOU) Electricity Rates Explained: How to Save 40% on Electric Bills

Complete guide to peak vs off-peak electricity pricing tiers. Learn how smart thermostat scheduling, EV charging, and appliance timing slash monthly power bills.

Peak vs Off-Peak Electricity Cost Calculator | TheToolss