Free Electricity Calculator - Calculate Energy Costs
Calculate electricity usage and cost for any appliance. Best free electricity calculator 2025 - see costs per hour, day, month, and year.
Quick Answer
Electricity cost = Watts × Hours used × Price per kWh / 1000. A 1000W heater running 8 hours at $0.12/kWh: 1000 × 8 × 0.12 / 1000 = $0.96/day. Calculate any appliance cost at practicalwebtools.com.
Key Facts about Electricity Calculator:
- Formula: kWh = Watts × Hours / 1000
- Cost = kWh × Price per kWh
- US average electricity: $0.16/kWh (varies by state)
- 1 kilowatt-hour (kWh) = 1000 watts for 1 hour
- Major users: HVAC, water heater, dryer, refrigerator
- Phantom loads (standby power) add 5-10% to bills
- LED bulbs use 75% less energy than incandescent
Why Use Our Electricity Calculator?
Calculate energy costs:
kWh Calculator
Calculate energy consumption.
Cost Estimate
See daily, monthly, yearly cost.
Compare Appliances
Find energy hogs.
Custom Rates
Enter your electricity price.
Usage Patterns
Daily hours calculation.
100% Private
Your data stays private.
How to Electricity Calculator in 3 Easy Steps
Calculate electricity cost:
Enter Wattage
Appliance power in watts.
Set Usage
Hours used per day.
Get Cost
See daily, monthly, yearly cost.
Manage Energy Costs
Know what appliances cost to run
Identify energy wasters
Plan for electricity bills
Make informed purchase decisions
Common Use Cases for Electricity Calculator
Essential for:
Frequently Asked Questions
Everything you need to know about our electricity calculator
How do I calculate electricity cost?
(Watts × Hours / 1000) × Rate. 60W bulb 5hr = $0.045/day.
Cost = (Watts × Hours / 1000) × Rate. A 60W bulb on 5 hours at $0.15/kWh: (60×5/1000) × 0.15 = $0.045/day or $1.35/month.
What is a kilowatt-hour (kWh)?
1000 watts for 1 hour. 100W bulb × 10 hours = 1 kWh.
A kWh is 1000 watts used for 1 hour. A 100W bulb on for 10 hours = 1 kWh. Your bill is charged per kWh.
What uses the most electricity?
HVAC (46%), water heating (14%), appliances (13%), electronics (12%).
Heating/cooling (46%), water heating (14%), appliances/lighting (13%), electronics (12%). HVAC is the biggest factor in most homes.
How can I reduce electricity costs?
LEDs, unplug devices, efficient appliances, seal leaks, power strips.
Use LED lights, unplug devices, adjust thermostat, use energy-efficient appliances, seal air leaks, use power strips for electronics.
Still have questions? Try the tool yourself!
Calculate CostRelated Tools You Might Like
Explore more free tools to boost your productivity
Calculate Electricity Cost Now
Free, instant, and helpful. Manage your energy costs.
Calculate CostNo signup required. Start using immediately.