Free Electricity Calculators
Real-cost math, not sticker rates. These calculators compute the full monthly bill — supply, delivery, and the fixed charge other comparisons leave off — across Texas, Ohio, Pennsylvania, Massachusetts, New Jersey, and Washington DC.
The 1,000 kWh Trap
Texas electricity plans show rates at 1,000 or 2,000 kWh—but most homes use somewhere in between. A "9¢/kWh" plan at 2,000 kWh might cost 13¢/kWh at 1,200 kWh. The advertised rate is technically true, but it can be misleading if it doesn't match your usage. These calculators help you find your real numbers.
Available Calculators
Free, no signup required. Get answers in under a minute.
Not sure which to use? Start with your question:
Bill Grade: Grade your Texas bill A–F
Two numbers off your bill. We compare against every live plan in your ZIP (TX, OH, PA, MA, NJ, DC) and give you an A–F grade plus the exact dollar overpay.
True Bill Estimator
ZIP + monthly kWh → realistic monthly total with supply, delivery, and the fixed charge other tools hide.
TOU Peak-Hour Visualizer
Pick your utility, see when peak hours hit, and model whether time-of-use would save you money.
Bill Analyzer
Upload your Texas electricity bill and see exactly how much you could save.
Texas-only. We read your current rate, usage patterns, and find ERCOT plans that match your actual consumption. OH/PA/MA/NJ/DC shoppers — use Bill Grade above instead.
kWh Usage Calculator
Find out your actual monthly usage so you can compare plans at the right level.
Plans are priced at 1,000 kWh—but most Texas homes use 1,200-1,500 kWh. Know your number before you shop.
kWh to Watts Converter
Convert between kilowatt-hours and watts instantly.
Understand the difference between energy (kWh) and power (watts). Calculate appliance costs.
Electricity Cost Estimator
See what you should pay each month based on your home and usage.
Compare your current bill to what you could be paying. Find out if you're overpaying.
Good Rate Checker
Is your current rate good? Compare it against what's available.
That "great rate" you signed up for might not be so great anymore. Check in 30 seconds.
What brings you here?
Choose your situation for the fastest path to answers.
Choosing a calculator
Which electricity calculator should I use?
Start with Bill Grade if you have a recent bill — it grades your rate A through F against every live plan in your ZIP across Texas, Ohio, Pennsylvania, Massachusetts, New Jersey, and Washington DC. Use the True Bill Estimator if you only know your ZIP and rough monthly kWh — it returns a line-item total with supply, delivery, and the fixed monthly charge most comparison tools hide. Use the TOU Visualizer if you live in Ohio, Pennsylvania, Massachusetts, New Jersey, or Washington DC and want to see when your utility's peak hours hit, sourced from NREL URDB tariff filings — it covers Texas utilities too. Use the kWh Usage Calculator before any of the above if you don't yet know your monthly usage.
How does the bill analyzer differ from the bill grade?
Bill Grade takes two numbers — your current rate and your usage — and assigns a letter grade by comparing against every live plan in your ZIP. It answers "am I overpaying, and by how much." The Bill Analyzer takes a full uploaded bill and reads the line items: supply rate, delivery charges, base fees, and usage patterns by season. It answers "why does my bill look like this, and which plans match my actual consumption profile." Bill Grade is a thirty-second check. Bill Analyzer is a deeper read for households on free-nights plans, prepaid plans, or plans with usage credits that distort the headline rate.
Can I use these tools if I'm not in Texas?
Yes — Bill Grade, True Bill Estimator, and the TOU Visualizer cover Texas (ERCOT, regulated by the PUCT), Ohio (regulated by the PUCO), Pennsylvania (regulated by the PA PUC), Massachusetts (regulated by the MA DPU), New Jersey (regulated by the NJ BPU), and Washington DC (regulated by the DC PSC). The kWh Usage Calculator and kWh-to-Watts Converter work anywhere. Tools labeled "Texas" in the URL — the Bill Analyzer, Electricity Cost Estimator, and Good Rate Checker — currently use ERCOT plan data only. We're expanding those to Ohio, Pennsylvania, Massachusetts, New Jersey, and Washington DC. Outside these six markets, the unit-conversion tools still apply, but the rate-shopping tools won't return competitive plans.
Frequently Asked Questions
Why do I need to know my kWh usage before comparing plans?
Texas electricity plans advertise rates at specific usage levels—usually 1,000 or 2,000 kWh. A plan that shows "9¢/kWh" at 2,000 kWh might cost 13¢/kWh if you only use 1,200 kWh. The advertised rate is technically true but can be misleading. Knowing your actual usage lets you see what you'd really pay.
What is a good electricity rate in Texas?
A good electricity rate in Texas is typically 10-12 cents per kWh for a fixed-rate plan in 2026. Rates below 10 cents are excellent, while rates above 14 cents are generally high. But the "best rate" depends on YOUR usage—high-usage homes (2,000+ kWh) often get better effective rates on plans with usage credits that don't help lower-usage homes.
How much electricity does a Texas home use?
The average Texas home uses 1,100-1,200 kWh per month—higher than the national average due to A/C demands. A 2,000 sq ft home typically uses 1,000-1,400 kWh monthly, while larger homes may use 1,500-2,500 kWh. Summer months can spike 30-50% higher. This matters because most plan rates are quoted at 1,000 kWh, which may not reflect your actual situation.
How do I know if I'm overpaying for electricity?
Use our Good Rate Checker to compare your current rate against available plans. If you're paying more than 12-13¢/kWh on a fixed plan, you may be overpaying. Also check when your contract expires—after expiration, many providers switch you to a much higher month-to-month rate without notice.
Ready to Compare Plans at Your Usage?
Enter your ZIP code to see plans priced at your actual usage level—not the misleading 1,000 kWh benchmark.
Compare Texas PlansRelated Guides
Learn more about choosing the right electricity plan in Texas.