Convert Kilojoules (kJ) to Kilocalories (kcal)

1 kJ = 0.239 kcal

How many Kilocalories in a Kilojoule?Printable chart →

Converting kilojoules (kJ) to kilocalories (kcal) is essential for understanding energy content in food and exercise. With the conversion factor of 1 kJ equaling 0.239006 kcal, you can easily manage your dietary energy intake. This tool is perfect for fitness enthusiasts and anyone looking to monitor their energy consumption.

Kilojoule (kJ)

Kilocalorie (kcal)

0.239006

≈ 15/64 kcal

Conversion Formula

kcal = kJ × 0.239006

Reverse: kJ = kcal × 4.184

Quick mental math: To quickly estimate kcal from kJ, divide the kJ value by 4.184.

Conversion Examples

1 kJ × 0.239006 =

0.239 kcal

1 Kilojoules = 0.239 Kilocalories

5 kJ × 0.239006 =

1.195 kcal

5 Kilojoules = 1.195 Kilocalories

10 kJ × 0.239006 =

2.39 kcal

10 Kilojoules = 2.39 Kilocalories

25 kJ × 0.239006 =

5.975 kcal

25 Kilojoules = 5.975 Kilocalories

50 kJ × 0.239006 =

11.95 kcal

50 Kilojoules = 11.95 Kilocalories

100 kJ × 0.239006 =

23.901 kcal

100 Kilojoules = 23.901 Kilocalories

Kilojoule to Kilocalorie Table

Quick convert your value:

kJ =—kcal

Start:Step:Rows:Precision:

Kilojoule (kJ)	Kilocalorie (kcal)	Fraction
1	0.239	15/64
6	1.434	1 7/16
11	2.6291	2 5/8
16	3.8241	3 53/64
21	5.0191	5 1/64
26	6.2141	6 7/32
31	7.4092	7 13/32
36	8.6042	8 39/64
41	9.7992	9 51/64
46	10.9943	—
51	12.1893	12 3/16
56	13.3843	13 25/64
61	14.5793	14 37/64
66	15.7744	15 25/32
71	16.9694	16 31/32
76	18.1644	18 11/64
81	19.3595	19 23/64
86	20.5545	20 35/64
91	21.7495	21 3/4
96	22.9446	22 15/16

Unit Definitions

What is a Kilojoule (kJ)?

Metric (SI)Worldwide

A kilojoule (kJ) is a unit of energy in the International System of Units (SI) and is equal to 1,000 joules.

History

The kilojoule emerged in the late 19th century as a part of the joule system, named after the British physicist James Prescott Joule who contributed significantly to the understanding of energy. It has since been adopted in various scientific and health-related fields to quantify energy content.

Current Use

Today, kilojoules are widely used in nutrition labels, exercise physiology, and scientific research to measure energy.

Learn more about Kilojoule

What is a Kilocalorie (kcal)?

Metric (SI)Worldwide

A kilocalorie (kcal), often referred to as a 'calorie' in dietary contexts, represents the amount of energy required to raise one kilogram of water by one degree Celsius.

History

The concept of the kilocalorie dates back to the 19th century, initially used in thermodynamics. It became popular in nutrition as a way to express energy content in food.

Current Use

Kilocalories remain the standard measurement for dietary energy in many countries, often found on food packaging and in dietary guidelines.

Learn more about Kilocalorie

Frequently Asked Questions

How can I use kJ to kcal conversion in my diet?

If you’re following a specific diet plan, knowing how to convert kilojoules to kilocalories can be handy. For instance, if a snack contains 500 kJ, you can convert that to kcal by multiplying 500 by 0.239006, which gives you approximately 119.5 kcal. This helps you gauge how much energy you’re consuming and adjust your meals accordingly.

What is the energy content of common foods in kJ and kcal?

Many food items list energy content in both kJ and kcal. For example, a 100-gram serving of almonds contains about 2400 kJ, which converts to approximately 573.5 kcal. By understanding these conversions, you can make better food choices and maintain a balanced diet.

How does exercise relate to kJ and kcal?

When tracking your exercise, it's beneficial to understand the energy burnt in kJ versus kcal. For instance, a 30-minute jog may burn around 1,000 kJ, which equals about 239.006 kcal. Knowing this can help you plan your workouts and dietary intake more effectively.

How can I convert kJ to kcal for cooking?

If you're following a recipe that lists energy in kJ, you can easily convert it to kcal. For example, if a dish contains 800 kJ, you would convert this to kcal by multiplying 800 by 0.239006, resulting in approximately 191.2 kcal. This is useful for meal prep and understanding the caloric content of your meals.

Why is kJ used more in some countries than kcal?

Kilojoules are commonly used in countries like Australia and New Zealand for food labeling, while kilocalories are more prevalent in the United States. For instance, a pack of chips may state it has 1600 kJ, which you can convert to about 382.2 kcal. Understanding both units helps you adapt to different dietary guidelines and product labels.

Popular Energy Conversions

Kilowatt to HorsepowerkW → HP Calorie to Kilocaloriecal → kcal Joule to CalorieJ → cal Kilowatt-hour to BTUkWh → BTU BTU to JouleBTU → J Kilocalorie to Joulekcal → J

Convert Kilojoule to Other Units

Kilojoule to Joule→ J Kilojoule to Joule→ J Kilojoule to Calorie→ cal Kilojoule to Watt-hour→ Wh Kilojoule to Kilowatt-hour→ kWh Kilojoule to BTU→ BTU Kilojoule to Kilowatt→ kW Kilojoule to Horsepower→ HP

Related Conversions

Joule to KilojouleJ → kJ Joule to KilocalorieJ → kcal Kilojoule to JoulekJ → J Kilojoule to CaloriekJ → cal Kilojoule to Watt-hourkJ → Wh