Kilowatt-hours to Joules Converter

Convert Electrical Energy from Kilowatt-hours to Joules with Precision

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Kilowatt-hours to Joules Calculator

Convert energy values from Kilowatt-hours (kWh) to Joules (J) with high precision.

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Electricity Cost Calculator

Calculate energy consumption cost based on power rating and usage time.

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Understanding Electrical Energy Units

The Kilowatt-hour (kWh)

Key concepts:

  • 1 kWh = 3.6 × 10⁶ J
  • Unit of electrical energy
  • Common in utility billing
  • Power × time measure
  • Industrial standard unit

Power vs Energy

Important distinctions:

  • Power: rate of energy use
  • Energy: total work done
  • 1 kW = 1000 joules/second
  • E = P × t relationship
  • Capacity vs consumption

Typical Consumption

Common appliances:

  • LED bulb: 0.01 kWh/hour
  • Refrigerator: 2 kWh/day
  • AC unit: 3 kWh/hour
  • Electric car: 30 kWh/100mi
  • Home: 30 kWh/day avg

Energy Efficiency

Key factors:

  • Power factor
  • Standby consumption
  • Peak vs off-peak
  • Energy ratings
  • Load management

Essential Energy Conversion Formulas

Basic Conversions

1 kWh = 3,600,000 J

1 kWh = 3.6 MJ

Energy Calculations

E(kWh) = P(kW) × t(h)

Cost = E × Rate

Power Relations

P = VI (DC circuits)

P = VI cos φ (AC circuits)