Kilocalorie/Hour to BTU/Hour Converter

Power Converter

22 units available

Decimals:

From

To

3.965667

1 kcal/h = 3.965667 BTU/h

Formula:

BTU/h = kcal/h × 3.9656668306

With your value: 1 kcal/h = 3.96566683 BTU/h

How big is that?

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

Your value1.00 kcal/h

LED bulb (7.7× your value)7.74 kcal/h

Laptop (56× your value)55.9 kcal/h

Microwave oven (8.6e+2× your value)860 kcal/h

Electric kettle (2.6e+3× your value)2.58e+3 kcal/h

Family car engine (7.7e+4× your value)7.74e+4 kcal/h

Other Kilocalorie/Hour to BTU/Hour conversions

2 kcal/h to BTU/h 3 kcal/h to BTU/h 4 kcal/h to BTU/h 5 kcal/h to BTU/h 6 kcal/h to BTU/h 7 kcal/h to BTU/h 8 kcal/h to BTU/h

Kilocalorie/Hour to BTU/Hour Conversion Table

Kilocalorie/Hour (kcal/h)	BTU/Hour (BTU/h)
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	1,982.833415
1000	3,965.666831

BTU/Hour to Kilocalorie/Hour Conversion Table

BTU/Hour (BTU/h)	Kilocalorie/Hour (kcal/h)
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/Hour (kcal/h)

Power

Exact conversion

Derived from the watt (1 W = 1 J/s).

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/Hour (BTU/h)

Power

Exact conversion

Derived from the watt (1 W = 1 J/s).

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/Hour to BTU/Hour

To convert from Kilocalorie/Hour (kcal/h) to BTU/Hour (BTU/h), multiply the value by 3.9656668306.

Formula: BTU/h = kcal/h × 3.9656668306

Reverse: kcal/h = BTU/h × 0.2521644008

Step-by-Step Example

Start with your value in Kilocalorie/Hour. For example: 5 kcal/h
Multiply by the conversion factor: 5 x 3.9656668306
The result is: 19.828334 BTU/h

About Kilocalorie/Hour

The kilocalorie/hour (kcal/h) is a unit of power. One kilocalorie/hour equals 1.162222222 watts. UnitConvertLab converts it against every other power unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

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

About BTU/Hour

The btu/hour (BTU/h) is a unit of power. One btu/hour equals 0.2930710702 watts. UnitConvertLab converts it against every other power unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

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

Frequently Asked Questions

How many BTU/Hour are in 1 Kilocalorie/Hour?

There are exactly 3.9656668306 BTU/Hour in 1 Kilocalorie/Hour. This means the conversion factor from Kilocalorie/Hour to BTU/Hour is 3.9656668306.

What is the formula to convert Kilocalorie/Hour to BTU/Hour?

The formula to convert Kilocalorie/Hour to BTU/Hour is: BTU/h = kcal/h × 3.9656668306. For example, to convert 10 Kilocalorie/Hour to BTU/Hour, you would multiply 10 by 3.9656668306.

What is a Kilocalorie/Hour?