Electricity Cost Calculator
Calculate energy consumption and electricity costs for any appliance.
Power (kW) = Watts ÷ 1000\nDaily Energy (kWh) = kW × Hours per Day\nMonthly Energy = Daily kWh × Days per Month\nAnnual Energy = Daily kWh × 365\nCost = Energy (kWh) × Rate ($/kWh)
Example:\nSpace heater: 1,500W\nUsage: 8 hrs/day, 30 days/month\nRate: $0.13/kWh\n\nDaily = 1.5 kW × 8 hrs = 12 kWh\nMonthly = 12 × 30 = 360 kWh\nMonthly Cost = 360 × $0.13 = $46.80\nAnnual Cost = $46.80 × 12 ≈ $561.60
How do I find wattage?
Check appliance label, manual, or nameplate. Or use: Watts = Volts × Amps. Example: 120V × 10A = 1200W.
What is a kilowatt-hour (kWh)?
1 kWh = using 1,000 watts for 1 hour. Example: a 100W bulb for 10 hours = 1 kWh.
What is a typical electricity rate?
US average: $0.13-0.15/kWh. Varies widely by state, time of use, and utility. Check your electricity bill.
How can I reduce electricity costs?
Use energy-efficient appliances, LED bulbs, unplug devices when not in use, adjust thermostat, and use timers/smart plugs.
What appliances use the most energy?
HVAC systems, water heaters, refrigerators, washers/dryers, and electric ovens typically consume the most.
🔗 Related Calculators
📐 Formula
Power (kW) = Watts ÷ 1000\nDaily Energy (kWh) = kW × Hours per Day\nMonthly Energy = Daily kWh × Days per Month\nAnnual Energy = Daily kWh × 365\nCost = Energy (kWh) × Rate ($/kWh)
📝 Example Calculation
Example:\nSpace heater: 1,500W\nUsage: 8 hrs/day, 30 days/month\nRate: $0.13/kWh\n\nDaily = 1.5 kW × 8 hrs = 12 kWh\nMonthly = 12 × 30 = 360 kWh\nMonthly Cost = 360 × $0.13 = $46.80\nAnnual Cost = $46.80 × 12 ≈ $561.60
❓ Frequently Asked Questions
How do I find wattage?▼
Check appliance label, manual, or nameplate. Or use: Watts = Volts × Amps. Example: 120V × 10A = 1200W.
What is a kilowatt-hour (kWh)?▼
1 kWh = using 1,000 watts for 1 hour. Example: a 100W bulb for 10 hours = 1 kWh.
What is a typical electricity rate?▼
US average: $0.13-0.15/kWh. Varies widely by state, time of use, and utility. Check your electricity bill.
How can I reduce electricity costs?▼
Use energy-efficient appliances, LED bulbs, unplug devices when not in use, adjust thermostat, and use timers/smart plugs.
What appliances use the most energy?▼
HVAC systems, water heaters, refrigerators, washers/dryers, and electric ovens typically consume the most.