Energy Unit Conversion Calculator
Conversion Result
Use the converter above to calculate different values and units
Energy Conversion FAQs
Find answers to common questions about energy measurements and conversions.
The main energy measurement units are: 1) Joule (J) - SI unit of energy, 2) Kilowatt-hour (kWh) - electrical energy consumption, 3) British Thermal Unit (BTU) - heating/cooling energy, 4) Calorie (cal) - food energy, 5) Megajoule (MJ) - industrial processes, 6) Therm - natural gas energy, 7) Electron volt (eV) - atomic energy.
Common energy conversions include: 1) 1 kWh = 3.6 MJ = 3,412 BTU, 2) 1 calorie = 4.184 joules, 3) 1 BTU = 1,055 joules, 4) 1 therm = 100,000 BTU = 29.3 kWh, 5) 1 MJ = 0.278 kWh = 947.8 BTU. Always consider the context and application when converting.
Power and energy are related as follows: 1) Energy = Power × Time (e.g., kWh = kW × hours), 2) Power is the rate of energy transfer (watts = joules/second), 3) 1 kilowatt running for 1 hour = 1 kilowatt-hour, 4) Energy cost calculations use kWh, not kW, 5) Battery capacity is often in watt-hours (Wh) or ampere-hours (Ah).
Calculate energy costs using: 1) Electricity: kWh × rate per kWh, 2) Natural gas: therms × rate per therm, 3) Consider peak vs. off-peak rates, 4) Add fixed charges and taxes, 5) For appliances: power rating (W) × hours used ÷ 1000 = kWh, 6) Annual cost = daily kWh × 365 × rate.
Common energy consumption values: 1) Average home: 30 kWh/day, 2) Electric oven: 2-2.5 kWh/hour, 3) LED bulb: 0.01 kWh/hour, 4) Air conditioner: 3-5 kWh/hour, 5) Electric car charging: 30-70 kWh per full charge, 6) Gaming PC: 0.3-0.5 kWh/hour, 7) Refrigerator: 2-3 kWh/day.
Energy measurement methods include: 1) Electricity: kWh meters/smart meters, 2) Heat energy: calorimeters/BTU meters, 3) Mechanical energy: dynamometers/torque meters, 4) Chemical energy: bomb calorimeters, 5) Nuclear energy: radiation detectors, 6) Food energy: calorimetry/nutrition analysis.
Energy conversion efficiency depends on: 1) System losses and heat dissipation, 2) Equipment condition and maintenance, 3) Environmental conditions (temperature/humidity), 4) Operating parameters (load/speed), 5) Energy quality and form, 6) Conversion process type, 7) System design and optimization.
Select energy units based on: 1) Industry standards (utilities use kWh, HVAC uses BTU), 2) Application scale (household vs. industrial), 3) Regional conventions (US vs. metric), 4) Calculation precision needs, 5) Equipment specifications, 6) Regulatory requirements, 7) End-user understanding.