Complete Electricity Calculator Guide
Our comprehensive electricity calculator helps you calculate electrical power, energy consumption, electricity costs, and perform various electrical conversions. Whether you're an engineer, electrician, or homeowner, this tool provides accurate calculations for all your electrical needs.
Electrical Power Calculator
Calculate electrical power using various formulas:
- Single Phase Power: P = V × I × cos(φ)
- Three Phase Power: P = √3 × V × I × cos(φ)
- Apparent Power: S = V × I (VA)
- Reactive Power: Q = V × I × sin(φ) (VAR)
Energy Consumption Calculator
Calculate energy consumption and costs for electrical devices:
- Energy Formula: E = P × t (kWh = kW × hours)
- Daily Consumption: kWh/day = (Watts × Hours) / 1000
- Monthly Consumption: kWh/month = Daily kWh × Days
- Annual Consumption: kWh/year = Monthly kWh × 12
Electricity Cost Calculator
Calculate electricity bills and costs:
- Basic Cost: Cost = kWh × Rate per kWh
- Total Bill: Total = Energy Cost + Fixed Charges + Taxes
- Cost per Day: Daily Cost = (Device Watts × Hours × Rate) / 1000
- Annual Cost: Yearly Cost = Daily Cost × 365
Electrical Unit Conversions
| From |
To |
Conversion Factor |
| Watts (W) | Kilowatts (kW) | ÷ 1000 |
| Kilowatts (kW) | Horsepower (HP) | ÷ 0.746 |
| Watt-hours (Wh) | Kilowatt-hours (kWh) | ÷ 1000 |
| kWh | Joules (J) | × 3,600,000 |
| kWh | BTU | × 3,412 |
Electrical Load Calculator
Calculate total electrical load for installations:
- Connected Load: Sum of all device ratings
- Maximum Demand: Connected Load × Diversity Factor
- Design Load: Maximum Demand × Safety Factor
- Load Factor: Average Load / Peak Load
Electrical Efficiency Calculations
Calculate efficiency of electrical systems:
- Efficiency (%): (Output Power / Input Power) × 100
- Losses: Input Power - Output Power
- Energy Losses: Power Losses × Operating Hours
- Cost of Losses: Energy Losses × Electricity Rate
Common Electrical Calculations
| Device |
Typical Power (W) |
Daily Use (hrs) |
Daily kWh |
| LED Bulb (10W) | 10 | 6 | 0.06 |
| Ceiling Fan | 75 | 12 | 0.9 |
| Air Conditioner (1.5 Ton) | 1500 | 8 | 12 |
| Refrigerator | 200 | 24 | 4.8 |
| Television (LED 40") | 100 | 6 | 0.6 |
Power Factor and Its Importance
Understanding power factor in electrical calculations:
- Power Factor (PF): cos(φ) = Real Power / Apparent Power
- Unity Power Factor: PF = 1 (ideal, resistive load)
- Lagging Power Factor: PF < 1 (inductive loads like motors)
- Leading Power Factor: PF < 1 (capacitive loads)
- Power Factor Improvement: Use capacitors for inductive loads
Energy Saving Tips
- Use LED bulbs instead of incandescent bulbs (80% energy saving)
- Set air conditioner temperature to 24-26°C
- Use 5-star rated energy-efficient appliances
- Install power factor correction capacitors
- Regular maintenance of electrical equipment
- Use automatic power factor controllers
- Implement demand-side management
Electrical Safety and Standards
- Follow Indian Electricity Rules and Standards
- Use proper earthing and grounding systems
- Install RCCBs and MCBs for protection
- Regular testing of electrical installations
- Maintain proper load distribution
- Use certified electrical equipment
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