Kilocalorie to BTU (IT) Converter

Energy Converter

27 units available

Decimals:

From

To

3.965667

1 kcal = 3.965667 BTU (IT)

Formula:

BTU (IT) = kcal × 3.9656668314

With your value: 1 kcal = 3.96566683 BTU (IT)

How big is that?

Everyday references on a logarithmic scale, all expressed in kilocalorie so you can sanity-check the result.

Heartbeat (1/4.2e+3 your value)0.000239 kcal

Your value1.00 kcal

AA battery charge (2.4× your value)2.39 kcal

Slice of bread (67× your value)66.9 kcal

Daily food intake (2.0e+3× your value)2.01e+3 kcal

Litre of petrol (8.2e+3× your value)8.17e+3 kcal

Other Kilocalorie to BTU (IT) conversions

2 kcal to BTU (IT)3 kcal to BTU (IT)4 kcal to BTU (IT)5 kcal to BTU (IT)6 kcal to BTU (IT)7 kcal to BTU (IT)8 kcal to BTU (IT)

Kilocalorie to BTU (IT) Conversion Table

Kilocalorie (kcal)	BTU (IT) (BTU (IT))
0.5	1.982833
1	3.965667
2	7.931334
5	19.828334
10	39.656668
15	59.485002
20	79.313337
25	99.141671
50	198.283342
100	396.566683
250	991.416708
500	1,982.833416
1000	3,965.666831

BTU (IT) to Kilocalorie Conversion Table

BTU (IT) (BTU (IT))	Kilocalorie (kcal)
0.5	0.126082
1	0.252164
2	0.504329
5	1.260822
10	2.521644
15	3.782466
20	5.043288
25	6.30411
50	12.60822
100	25.21644
250	63.0411
500	126.0822
1000	252.164401

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.

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

BTU (IT) (BTU (IT))

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 Kilocalorie to BTU (IT)

To convert from Kilocalorie (kcal) to BTU (IT) (BTU (IT)), multiply the value by 3.9656668314.

Formula: BTU (IT) = kcal × 3.9656668314

Reverse: kcal = BTU (IT) × 0.2521644007

Step-by-Step Example

Start with your value in Kilocalorie. For example: 5 kcal
Multiply by the conversion factor: 5 x 3.9656668314
The result is: 19.828334 BTU (IT)

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.

About BTU (IT)

The btu (it) (BTU (IT)) is a unit of energy and work. One btu (it) equals 1055.055853 joules. UnitConvertLab converts it against every other energy unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: energy calculations, engineering and science, education.

Frequently Asked Questions

How many BTU (IT) are in 1 Kilocalorie?

There are exactly 3.9656668314 BTU (IT) in 1 Kilocalorie. This means the conversion factor from Kilocalorie to BTU (IT) is 3.9656668314.

What is the formula to convert Kilocalorie to BTU (IT)?

The formula to convert Kilocalorie to BTU (IT) is: BTU (IT) = kcal × 3.9656668314. For example, to convert 10 Kilocalorie to BTU (IT), you would multiply 10 by 3.9656668314.

What is a Kilocalorie?