Energy Converter

Convert Energy, Power & Fuel Efficiency with precision

Energy Units • Power Calculations • Fuel Economy • Real-world Context

Choose Conversion Type
Energy
🔌
Power
Fuel Economy
0.00
Enter amount to convert
Common Energy Conversions
⚡ kWh to MJ
Kilowatt hours to Megajoules
🔥 BTU to kJ
British Thermal Units to Kilojoules
🍎 kcal to J
Kilocalories to Joules
🔋 Wh to J
Watt hours to Joules
🏠 thm to kWh
Therms to Kilowatt hours
⚡ MJ to BTU
Megajoules to BTUs
Energy Category Features

⚡ Energy Conversions

  • 10 major energy units supported
  • Real-world context calculations
  • Scientific and practical units
  • Common equivalents display
  • Precision up to 6 significant figures

🔌 Power Calculations

  • Watts to horsepower conversions
  • Energy consumption over time
  • Power categorization (home, industrial)
  • Multiple horsepower standards
  • BTU/hour thermal calculations

⛽ Fuel Efficiency

  • MPG, L/100km, km/L conversions
  • US and Imperial gallon support
  • Annual fuel cost estimation
  • CO₂ emissions calculation
  • Efficiency categorization