About the Energy Converter

Every unit in this converter is a fixed multiple of the joule: 1 cal = 4.184 J, 1 kcal = 4,184 J, 1 kWh = 3.6 million J, 1 BTU ≈ 1,055.06 J, and 1 eV ≈ 1.602 × 10⁻¹⁹ J. Values normalize to joules first, then divide by the target unit's factor — an exact chain at any scale.

Scales Matter

The same physical quantity spans 36 orders of magnitude across fields: an electron's binding energy is a few eV, a snack is hundreds of kJ, and a home's monthly electricity use is several hundred kWh. Converting through joules keeps all of these comparable.