Electricity Usage and Bill Calculator

Calculate your monthly electricity usage and cost. See what your appliances are costing you and find where to save on your electric bill.

⚡ Energy📐 Monthly kWh = Total Watts x Hours/Day x 30 / 1,000
Heating/cooling (kWh/month est)
Water heater (kWh/month est)
Refrigerator (kWh/month est)
Washer + dryer (kWh/month est)
Lighting (kWh/month est)
Electronics + misc (kWh/month est)
Electricity rate ($/kWh)
Please enter valid values.

Formula & Reference

VariableFormulaUnits
Electricity Usage and Bill CalculatorMonthly kWh = Total Watts x Hours/Day x 30 / 1,000kWh / month

Step-by-Step Examples

Example 1
Average US Home

500 HVAC, 80 WH, 45 fridge, 70 laundry, 50 lighting, 100 misc, $0.13/kWh.

  • Total: 845 kWh/month | $109.85/month
  • US average: 886 kWh/month, $0.13/kWh = $115/month
✓ 845 kWh / $110/month
Example 2
Hot Climate Summer

800 HVAC, 100 WH, 50 fridge, 80 laundry, 60 lighting, 120 misc.

  • Total: 1,210 kWh | $157/month
  • Summer AC adds 300-500 kWh/month in hot climates
✓ 1,210 kWh / $157/month
Example 3
Efficient Home

200 HVAC (heat pump), 40 WH (heat pump WH), 35 fridge, 50 laundry, 25 lighting (LED), 80 misc.

  • Total: 430 kWh | $56/month
  • Efficient appliances cut usage nearly in half
✓ 430 kWh / $56/month

Real-World Applications

🏠
Homeowners
Understand and reduce your monthly electricity bill.
⚡
Energy Efficiency
Identify high-usage areas to target for savings.
☀️
Solar Buyers
Determine system size needed to offset your usage.
📊
Property Managers
Estimate electricity costs for rental units.

Common Mistakes to Avoid

⚠️
Not knowing your actual rate

Your electricity rate ($/kWh) is on your utility bill - look for it. It may have tiered pricing: cheaper below a usage threshold, more expensive above it. Also watch for demand charges and time-of-use rates.

⚠️
Forgetting seasonal variation

HVAC dominates electricity bills. Summer AC may add 200-500 kWh/month; winter electric heat may add 300-800 kWh/month depending on climate and heating system.

⚠️
Missing phantom loads

Always-on devices (TV standby, charging blocks, smart speakers) add 50-150 kWh/month collectively. Smart power strips eliminate phantom loads for entertainment centers.

Frequently Asked Questions

Average US electricity bill? ▾
National average: $140/month for residential customers (2024). Ranges: Hawaii $200+, California $130-180, Louisiana/Oklahoma $80-100. Varies enormously by home size, climate, and heating/cooling method.
What uses the most electricity? ▾
Heating and cooling: 40-50% of electricity bill. Water heating: 14-18% (electric tank). Washer/dryer: 5-7%. Refrigerator: 4-5%. Lighting: 4-6%. The biggest savings come from HVAC efficiency.
How to read my electricity bill? ▾
Key line items: kWh used (total consumption), rate per kWh (energy charge), delivery charge (for distribution infrastructure), taxes and fees. Your kWh usage x rate = energy charge. Other charges are mostly fixed.
What is time-of-use pricing? ▾
Some utilities charge different rates at different times. Peak hours (usually 4-9 PM weekdays): higher rates. Off-peak (nights, weekends): lower rates. Running dishwasher and laundry at night can save 20-30% on those appliances.
How can solar reduce my bill? ▾
A 6-8 kW solar system generates approximately 800-1,000 kWh/month in average US sunlight, potentially covering most or all of an average home's usage. Net metering credits excess production against your bill.

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