Electricity Bill Calculator
Estimate your electricity bill from units used and your rate per kWh.
About this tool
Estimate your electricity bill from the units (kWh) you used and your rate per unit, plus any fixed monthly charge your utility adds.
Key Features
- Works with any currency — enter your own rate
- Optional fixed/standing charge
- Simple flat-rate calculation
- Instant results
How to Use
- Enter units used (check your meter or a previous bill).
- Enter your rate per kWh.
- Add a fixed charge if your utility bills one.
- Click Calculate.
Benefits
- Sanity-check a bill before it arrives
- Compare rate plans
- Estimate the cost of running an appliance
Frequently Asked Questions
It's printed on a previous electricity bill, usually labeled "rate," "tariff," or "price per unit." You can also find it on your utility provider's website or your service agreement.
This calculator uses a single flat rate. Many utilities charge in tiers (a higher rate once you pass a usage threshold), add taxes, fuel surcharges, or time-of-use pricing that varies by hour. Treat this as an estimate, not a substitute for your actual bill.
Multiply the appliance's wattage by the hours you run it, then divide by 1000 to get kWh. For example, a 100-watt bulb run for 10 hours uses (100 × 10) ÷ 1000 = 1 kWh.