Electricity Bill Calculator
Estimate your monthly electricity bill in seconds. Enter your monthly usage and rate — or build your usage appliance by appliance — and see your daily, monthly, and yearly cost instantly.
Find this on your last bill. Typical home: 500–1,200 kWh/month.
| Appliance | Watts | Hrs/day | Remove |
|---|
Monthly kWh per appliance = watts × hours/day × 30 ÷ 1,000.
Fixed daily supply/service charge, if your utility bills one.
Estimated monthly bill
$0
based on 0 kWh/month
Estimates only — actual bills may include tiered rates, taxes, and fees. Check your utility's tariff for exact figures.
How this electricity bill calculator works
Your electricity bill is mostly a simple multiplication: monthly kWh × price per kWh. This tool does that math instantly, adds any fixed daily standing charge (× 30 days), and shows the result per day, per month, and per year.
Not sure what your monthly kWh is? Switch to Build from appliances and add the things you actually run. Each appliance's monthly usage is watts × hours per day × 30 ÷ 1,000 — the calculator totals them for you. It's a great way to see which devices dominate your bill (heating, cooling, and anything with a heating element usually top the list).
Electricity bill FAQ
How do I calculate my electricity bill?
Multiply your monthly usage in kilowatt-hours (kWh) by your price per kWh. For example, 850 kWh at $0.15/kWh is 850 × 0.15 = $127.50 per month. If your utility charges a fixed daily standing charge, add that on top (daily charge × 30).
Where do I find my price per kWh?
Check a recent bill for a line labelled rate, unit price, or price per kWh. If it isn't shown, divide the bill's energy charge by the kWh used that month. Rates typically range from about $0.10 to $0.40 per kWh depending on region and plan.
How do I work out the kWh an appliance uses?
Multiply its wattage by the hours it runs per day, multiply by 30 for a month, then divide by 1,000. A 1,500 W heater running 4 hours a day uses 1,500 × 4 × 30 ÷ 1,000 = 180 kWh per month.
What is a standing charge?
A standing charge (also called a daily supply, service, or connection charge) is a fixed daily amount your utility bills regardless of usage. This calculator adds it as daily charge × 30 to your monthly total.
Why is my estimate different from my actual bill?
Real bills can include tiered or time-of-use rates, taxes, levies, and seasonal swings that a flat-rate estimate doesn't capture. Treat this as a close planning estimate and check your utility's exact tariff for the precise figure.