Kilocalorie to Kilojoule Converter (kcal to kJ)

How to Convert Kilocalorie to Kilojoule

Formula: Kilojoule = Kilocalorie × 4.184

Example: 1 kcal = 4.184 kJ

You can also use the interactive converter above. Simply enter any Kilocalorie value and the equivalent Kilojoule value will appear instantly. Click the ⇄ button to reverse the conversion.

To get more out of this conversion, it helps to know where Kilocalorie and Kilojoule actually show up in daily life, plus the quick facts people usually search for.

Step-by-step example — Convert 200 kcal to kJ:

What is Kilocalorie and Kilojoule?

A Kilocalorie (kcal) equals 1,000 calories and is the actual unit behind the 'Calorie' shown on food nutrition labels.

A Kilojoule (kJ) equals 1,000 joules and is used on nutrition labels in many countries outside the US.

Real World Uses of Kilocalorie to Kilojoule Conversion

• Kilocalorie: Commonly used for estimating calories burned during exercise.
• Kilojoule: Commonly used for labeling food energy content in countries using the metric system.
• Kilocalorie: Commonly used by nutritionists and fitness trackers to measure energy intake and burn.
• Kilojoule: Commonly used in engineering and chemistry for everyday-scale energy calculations.

Frequently Asked Questions

What is the formula to convert Kilocalorie to Kilojoule?

The formula is: Kilojoule = Kilocalorie x 4.184. Multiply any Kilocalorie value by 4.184 to get the equivalent in Kilojoule.

What is 1 Kilocalorie in Kilojoule?

1 kcal = 4.184 kJ.

How many Kilocalorie are in 1 Kilojoule?

1 kJ = 0.239005736137667 kcal.

Is Kilocalorie bigger or smaller than Kilojoule?

Kilocalorie is bigger than Kilojoule. 1 Kilocalorie = 4.184 kJ.

What is 500 kcal in kJ?

500 kcal = 2,092 kJ.

What is 1000 kJ in kcal?

1000 kJ = 239.0057361 kcal.

How many kilocalories does a typical adult need per day?

General guidelines suggest around 2,000 kcal per day for an average adult, though actual needs depend on age, activity level and body size.