BTU/Second to Kilocalorie/Hour Converter

Power Converter

22 units available

Decimals:

From

To

907.791843

1 BTU/s = 907.791843 kcal/h

Formula:

kcal/h = BTU/s × 907.791842772

With your value: 1 BTU/s = 907.79184277 kcal/h

How big is that?

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

LED bulb (1/1.2e+2 your value)0.00853 BTU/s

Laptop (1/16 your value)0.0616 BTU/s

Microwave oven (1/1.1 your value)0.948 BTU/s

Your value1.00 BTU/s

Electric kettle (2.8× your value)2.84 BTU/s

Family car engine (85× your value)85.3 BTU/s

Other BTU/Second to Kilocalorie/Hour conversions

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

BTU/Second to Kilocalorie/Hour Conversion Table

BTU/Second (BTU/s)	Kilocalorie/Hour (kcal/h)
0.5	453.895921
1	907.791843
2	1,815.583686
5	4,538.959214
10	9,077.918428
15	13,616.877642
20	18,155.836855
25	22,694.796069
50	45,389.592139
100	90,779.184277
250	226,947.960693
500	453,895.921386
1000	907,791.842772

Kilocalorie/Hour to BTU/Second Conversion Table

Kilocalorie/Hour (kcal/h)	BTU/Second (BTU/s)
0.5	0.000551
1	0.001102
2	0.002203
5	0.005508
10	0.011016
15	0.016524
20	0.022031
25	0.027539
50	0.055079
100	0.110157
250	0.275394
500	0.550787
1000	1.101574

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.

BTU/Second (BTU/s)

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

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

How to Convert BTU/Second to Kilocalorie/Hour

To convert from BTU/Second (BTU/s) to Kilocalorie/Hour (kcal/h), multiply the value by 907.791842772.

Formula: kcal/h = BTU/s × 907.791842772

Reverse: BTU/s = kcal/h × 0.0011015741

Step-by-Step Example

Start with your value in BTU/Second. For example: 5 BTU/s
Multiply by the conversion factor: 5 x 907.791842772
The result is: 4,538.959214 kcal/h

About BTU/Second

The btu/second (BTU/s) is a unit of power. One btu/second equals 1055.055853 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 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.

Frequently Asked Questions

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

There are exactly 907.791842772 Kilocalorie/Hour in 1 BTU/Second. This means the conversion factor from BTU/Second to Kilocalorie/Hour is 907.791842772.

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

The formula to convert BTU/Second to Kilocalorie/Hour is: kcal/h = BTU/s × 907.791842772. For example, to convert 10 BTU/Second to Kilocalorie/Hour, you would multiply 10 by 907.791842772.

What is a BTU/Second?