MeasureCalc

Energy Converter

Convert units in the energy converter category with fast, accurate online tools.

About energy units

Energy is the capacity to do work. Joule (J) is SI; calorie and BTU are legacy units; Wh/kWh for electricity.

  • Food ‘Calorie’: actually kilocalorie (kcal).
  • 1 Wh: 3,600 J.

Units in Energy Converter

Browse common units in this category and learn where they are typically used.

  • BTU (IT) (btu)
    BTU (IT) is an energy unit used to describe work, heat, or stored energy.
  • Calorie (cal) (cal)
    Calorie (cal) ≈ 4.184 J; used in thermochemistry.
  • Joule (J) (j)
    Joule (J) = 1 N·m = energy of 1 newton over 1 meter.
  • Kilocalorie (kcal) (kcal)
    Kilocalorie (kcal) = ‘food Calorie’; ≈ 4,184 J.
  • Kilowatt-hour (kWh) (kwh)
    1 kWh = 3.6 MJ, the billing unit for electricity.
  • Watt-hour (Wh) (wh)
    Watt-hour (Wh) is an energy unit used to describe work, heat, or stored energy.

Popular energy conversions

Start with some of the most frequently used conversions in this category.

Quick examples

Open a few ready-made examples for common real-world conversions.

FAQ

Is energy conversion exact?
Many conversions are exact by definition (e.g., 1 in = 25.4 mm, 1 ft = 0.3048 m).
Can I share a specific result?
Yes. Every converter has a clean, shareable URL like /convert/meter-to-foot/2.5.

Browse other categories

Explore other measurement categories available on MeasureCalc.