Electricity Cost Calculator
Estimate running cost of any appliance by wattage and hours.
See how it works
Watch a quick simulation of this tool in action — no file needed.
How to use Electricity Cost Calculator
Follow these steps — everything happens instantly in your browser.
- 1
Step 1. Enter the appliance wattage (check the label).
- 2
Step 2. Set hours used per day and days per month.
- 3
Step 3. Enter your electricity rate per kWh (check your bill).
- 4
Step 4. See monthly cost, kWh usage, and annual cost.
Why use this tool
Private by design
All processing happens locally in your browser. Open DevTools → Network and you'll see zero file uploads. Ever.
Instant
No upload wait, no queue, no server round-trip. Results appear the moment you drop a file.
Free & unlimited
No accounts, no watermarks, no daily caps. Use it as many times as you like, forever.
Works everywhere
Desktop, tablet or phone — every tool is responsive and installable as a PWA for offline use.
Frequently asked questions
Everything you might want to know about electricity cost calculator.
Carbon Footprint Calculator
Estimate your annual CO₂ emissions from energy, transport, and flights.
Fuel Cost Calculator
Estimate fuel used and trip cost from distance, efficiency and price.
Savings Goal Calculator
How long until you reach your savings goal — with interest.
Tip Calculator
Split the bill and tip fairly — quick percentages, per-person total.