Calorie (th) to Kilocalorie Converter

Energy Converter

27 units available

Decimals:

From

To

0.001

1 cal = 0.001 kcal

Formula:

kcal = cal × 0.001

With your value: 1 cal = 0.001 kcal

How big is that?

Everyday references on a logarithmic scale, all expressed in calorie (th) so you can sanity-check the result.

Heartbeat (1/4.2 your value)0.239 cal

Your value1.00 cal

AA battery charge (2.4e+3× your value)2.39e+3 cal

Slice of bread (6.7e+4× your value)6.69e+4 cal

Daily food intake (2.0e+6× your value)2.01e+6 cal

Litre of petrol (8.2e+6× your value)8.17e+6 cal

Other Calorie (th) to Kilocalorie conversions

2 cal to kcal 3 cal to kcal 4 cal to kcal 5 cal to kcal 6 cal to kcal 7 cal to kcal 8 cal to kcal

Calorie (th) to Kilocalorie Conversion Table

Calorie (th) (cal)	Kilocalorie (kcal)
0.5	0.0005
1	0.001
2	0.002
5	0.005
10	0.01
15	0.015
20	0.02
25	0.025
50	0.05
100	0.1
250	0.25
500	0.5
1000	1

Kilocalorie to Calorie (th) Conversion Table

Kilocalorie (kcal)	Calorie (th) (cal)
0.5	500
1	1,000
2	2,000
5	5,000
10	10,000
15	15,000
20	20,000
25	25,000
50	50,000
100	100,000
250	250,000
500	500,000
1000	1,000,000

Where these values come from

Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.

Calorie (th) (cal)

Energy

Exact conversion

The thermochemical calorie is exactly 4.184 J.

The International Table calorie (4.1868 J) and the 15 °C calorie differ slightly.

Source: NIST Special Publication 811, Guide for the Use of the International System of Units

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

Kilocalorie (kcal)

Energy

Exact conversion

Derived from the joule (1 J = 1 kg·m²/s²). Thermochemical and IT calories, BTU and kWh are exact defined multiples.

Source: NIST Special Publication 811, Guide for the Use of the International System of Units

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

How to Convert Calorie (th) to Kilocalorie

To convert from Calorie (th) (cal) to Kilocalorie (kcal), multiply the value by 0.001.

Formula: kcal = cal × 0.001

Reverse: cal = kcal × 1,000

Step-by-Step Example

Start with your value in Calorie (th). For example: 5 cal
Multiply by the conversion factor: 5 x 0.001
The result is: 0.005 kcal

About Calorie (th)

The thermochemical calorie equals 4.184 joules. Not to be confused with the food Calorie (kcal), which equals 1,000 calories.

Common uses: chemistry, nutrition, heating.

About Kilocalorie

The kilocalorie (food Calorie) equals 1,000 calories or 4,184 joules. It is the standard unit for food energy content.

Common uses: nutrition, diet, food labeling.

Frequently Asked Questions

How many Kilocalorie are in 1 Calorie (th)?

There are exactly 0.001 Kilocalorie in 1 Calorie (th). This means the conversion factor from Calorie (th) to Kilocalorie is 0.001.

What is the formula to convert Calorie (th) to Kilocalorie?

The formula to convert Calorie (th) to Kilocalorie is: kcal = cal × 0.001. For example, to convert 10 Calorie (th) to Kilocalorie, you would multiply 10 by 0.001.

What is a Calorie (th)?