kilocalories to kilojoules — kcal to kJ Converter

Conversion Formula

Multiply the kilocalories value by the conversion factor:
kJ = kcal × 4.184

How to Convert Step by Step

• Enter the number of kilocalories you want to convert (e.g. 10 kcal).
• Multiply it by the factor 4.184.
• Round the result to 2–4 decimals for practical use — done, that is your value in kilojoules.

Common kilocalories to kJ Conversion Table

Real-World Examples

• Kilocalories are used for food labels, weight loss, and workouts. Example: 10 kcal ≈ 41.84 kJ.
• Kilojoules are used for food energy and exercise. Example: 20 kJ ≈ 4.7801 kcal.
• Kilocalories are used for food labels, weight loss, and workouts. Another common case: 50 kcal = 209.2 kJ.

About kilocalories & kilojoules

• kilocalories: The kilocalorie ("Calorie") measures food and exercise energy: 4.184 kJ each. Adults need ~2,000 kcal daily.
• kilojoules: A kilojoule is 1,000 J, used on AU/NZ food labels. 1 large Calorie = 4.184 kJ.

FAQ

How many kilojoules in 1 kcal?

1 kcal = 4.184 kJ. Use the converter above to compute any value, or multiply kcal by 4.184.

Is this kilocalories-to-kilojoules converter accurate?

Yes — conversions use the standard international factors and are rounded to 4 decimals.

When is kilocalories to kilojoules conversion used?

Kilocalories are used for food labels, weight loss, and workouts. Kilojoules are used for food energy and exercise. Whenever a value is given in kcal but you need kJ, this converter is the quick fix.

Related Conversions

joules→kilojouleskilojoules→jouleskilojoules→megajoulesmegajoules→kilojouleswatt-hours→kilowatt-hourskilowatt-hours→watt-hourskilowatt-hours→megajoulesmegajoules→kilowatt-hourskilojoules→kilocalories