Utilities & Power

Power & Energy Bill Calculator

Calculate appliance wattage electricity consumption in kilowatt-hours (kWh) and monthly energy bill impact.

Formula Verified & Maintained by:David Miller, CPA

CPA, M.S. Finance (NYU Stern) • Lead Financial Analyst & Tax Technology Editor

Peer-Reviewed AlgorithmAudited for 2026 Rules

Interactive Calculator

1. Provide Details

Appliance Wattage (Watts)

Hours Used per Day

hrs/day

Electricity Rate ($ per kWh)

$/kWh

2. Output Results

Estimated Monthly Cost$57.60

Estimated Yearly Cost$700.80

Daily Operating Cost$1.92

Monthly Electricity Usage360.0 kWh

How to Calculate: Formula & Steps

Electricity is billed per kilowatt-hour (kWh), where 1 kWh = 1,000 Watts used for 1 hour.

Formula Used:Monthly Cost = (Wattage x Daily Hours x 30 / 1000) x Rate per kWh

Step-by-Step Calculation Example

Running a 1,500W space heater for 8 hours daily at $0.16/kWh costs ~$57.60/month.

Common Mistakes to Avoid

Using peak surge wattage instead of average running wattage
Omitting utility delivery charges

Practical Use Cases

Home energy audit
Cryptocurrency & PC power budgeting

Expert Tips

Look up your utility bill's total kWh rate including distribution charges.

Disclaimer

This calculation tool is provided for educational and informational estimation purposes only. Results are based on mathematical formulas and user-supplied parameters. They do not constitute formal underwriting, financial, tax, engineering, or legal determinations.