How to Calculate Your Electric Bill from kWh (With Real Examples by City)
Use the simple formula (kWh × rate), see real examples by city, and learn how fixed fees, time-of-use pricing, and tiers affect your total bill.
If you've ever looked at your power bill and wondered "Where did this number even come from?" — the answer is simpler than most utilities make it seem.
Your electric bill is mostly based on just two things:
- How much electricity you used (in kilowatt-hours, or kWh)
- The rate you pay per kWh
Once you know those, you can estimate your bill in under a minute.
This guide walks through the exact formula, real examples, and the important caveats (like time-of-use pricing and extra fees) that can change your total.
Quick Answer: How to Calculate Your Electric Bill
Basic formula:
Electric bill ≈ kWh used × price per kWh
Example: If you used 900 kWh in a month and your rate is $0.16 per kWh:
900 × 0.16 = $144
That's the core energy charge before fixed fees, taxes, and other line items.
According to the U.S. Energy Information Administration, average residential electricity prices in the U.S. typically fall within a broad range depending on state and utility — which is why knowing your local rate matters so much.
Step 1: Find Your Monthly kWh Usage
Look at your electric bill for a line that says:
- "kWh used"
- "Energy usage"
- or "Metered consumption"
Most homes use somewhere between 600 and 1,200 kWh per month, but this varies widely depending on:
- Home size
- Air conditioning or electric heating
- Number of occupants
- Appliance use
If you want to compare your usage to your area, your local city page on Utility Rates shows typical household consumption assumptions alongside pricing.
Step 2: Find Your Electricity Rate ($ per kWh)
Your rate may appear as:
- "Energy charge"
- "Supply charge"
- "Generation charge"
It's usually listed in dollars per kWh (for example, $0.14/kWh).
If you don't see it clearly, you can estimate:
Rate ≈ Total energy charges ÷ total kWh used
Or you can use the average rate shown for your city or state on Utility Rates as a starting point.
Step 3: Multiply kWh × Rate
Here's the basic math in action:
| Monthly Usage | Rate per kWh | Estimated Energy Cost |
|---|---|---|
| 750 kWh | $0.14 | $105 |
| 1,000 kWh | $0.18 | $180 |
| 1,200 kWh | $0.22 | $264 |
This gives you the variable portion of your bill — the part that changes based on how much electricity you use.
Real Examples by City
Electric rates vary a lot by location due to fuel mix, infrastructure costs, regulations, and climate.
Here's how the same 1,000 kWh of usage can look in different places:
| City | Approx. rate context |
|---|---|
| Phoenix, AZ | Lower than national avg |
| Los Angeles, CA | Higher tiered rates |
| Houston, TX | Market-based supply |
(You can check the latest local breakdown — including base charges — on each city page.)
The key takeaway: Your usage might be average, but your bill can still be high if your local rate is high.
Important Caveats That Affect Your Bill
The simple formula works — but real bills often include extra layers.
1. Fixed Monthly Charges
Most utilities add a base service fee that does not depend on how much electricity you use.
Common names:
- Customer charge
- Service fee
- Meter fee
This generally ranges from $10–$30+ per month and is added after your energy charge.
2. Time-of-Use (TOU) Pricing
Some utilities charge different rates depending on the time of day.
Example structure:
- Peak hours (late afternoon/evening): High rate
- Off-peak (night/morning): Lower rate
If you use a lot of electricity during peak hours (AC, EV charging, laundry), your effective average rate may be much higher than the advertised base rate.
That means the simple formula still works — but you need to use your blended average rate, not just the lowest listed price. We cover why electric costs vary (including TOU and regulation) in our blog.
3. Tiered Rates
Becoming an increasingly common practice, electricity bills follow a tiered rate schedule. The more electricity you use, the higher the rate becomes after certain thresholds.
Example:
- First 500 kWh → .08/kWh
- Next 500 kWh → .09/kWh
In this case, your cost is calculated in blocks, not with one flat rate.
4. Delivery vs. Supply Charges
Your bill may split electricity costs into:
- Supply / Generation (cost for producing the power)
- Delivery / Distribution (cost for moving power through wires)
Even in deregulated markets where you choose a supplier, you still pay the local utility for delivery. Both parts together determine your true cost per kWh.
5. Taxes and Riders
Bills often include:
- Local taxes
- Energy efficiency programs
- Grid improvement surcharges
These are usually small individually but can add several dollars per month.
How to Get a More Accurate Estimate
To improve your estimate beyond the simple formula:
- Use your actual last month's kWh
- Divide your total energy-related charges by your kWh to find your real blended rate
- Add your fixed monthly charge
Or skip the manual math and use the appliance running cost tool on Utility Rates to estimate electricity costs based on your local pricing.
Why Understanding This Matters
Knowing how your bill is calculated helps you:
- Estimate the impact of running new appliances
- See how much raising or lowering AC settings costs
- Compare cities before moving
- Evaluate savings from cutting back on usage, timing usage, or solar or efficiency upgrades (see our solar payback calculator)
It turns your power bill from a mystery into a predictable, controllable expense.
FAQ
How many kWh does a house use per month?
Most U.S. homes use between 600 and 1,200 kWh per month, depending on climate, home size, and whether heating or cooling is electric.
What is a good electricity rate?
Rates vary widely by region. What's "good" in one state may be high in another. Always compare your rate to local averages on Utility Rates rather than national numbers.
Why is my bill higher than my calculation?
You may have:
- Peak-time usage
- Tiered pricing
- High fixed fees
- Seasonal rate changes
Check the detailed line items on your bill to see which apply. Our methodology explains how we handle base charges and rates when we estimate city costs.
Bottom Line
You can estimate your electric bill with one simple equation:
kWh used × your local rate
Just remember to account for fixed fees and special pricing structures like peak hours or tiers.
If you want a localized estimate using real utility data, check your city's electricity page on Utility Rates and plug your usage into our cost tools.