Kilojoule

kJ

Commonly Used Scientific Unit

The kilojoule is the practical metric unit for food energy on nutrition labels outside the United States. It's also used for describing thermal energy and power outputs.

Quick Converter

1 kJ = kJ

Controls display format. Very small or very large numbers will be shown in scientific notation (e.g., 1.5e-6).

Kilojoule (kJ)

The kilojoule is the practical metric unit for food energy on nutrition labels outside the United States. It’s also used for describing thermal energy and power outputs.

Characteristics

  • Metric system unit
  • 1 kJ = 1,000 joules
  • Food energy standard: outside US (vs. kilocalories/Calories in US)
  • Nutrition labels: show energy in kJ in most countries
  • Used in: nutrition, thermodynamics, engineering

Conversions

  • 1 kJ = 1000 J
  • 1 kJ = 239.006 calories
  • 1 kJ = 0.239006 kcal
  • 1 kJ = 0.000948 BTU
  • 1 kJ = 0.277778 Wh
  • 1 kJ = 0.001 MJ

Related Units

Used In Regions

EU International Nutrition
← Back to Energy & Power