BTU/Hour to Calorie/Second Converter

Power Converter

22 units available

Decimals:

From

To

0.070046

1 BTU/h = 0.070046 cal/s

Formula:

cal/s = BTU/h × 0.0700456669

With your value: 1 BTU/h = 0.07004567 cal/s

How big is that?

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

Your value1.00 BTU/h

LED bulb (31× your value)30.7 BTU/h

Laptop (2.2e+2× your value)222 BTU/h

Microwave oven (3.4e+3× your value)3.41e+3 BTU/h

Electric kettle (1.0e+4× your value)1.02e+4 BTU/h

Family car engine (3.1e+5× your value)3.07e+5 BTU/h

Other BTU/Hour to Calorie/Second conversions

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

BTU/Hour to Calorie/Second Conversion Table

BTU/Hour (BTU/h)	Calorie/Second (cal/s)
0.5	0.035023
1	0.070046
2	0.140091
5	0.350228
10	0.700457
15	1.050685
20	1.400913
25	1.751142
50	3.502283
100	7.004567
250	17.511417
500	35.022833
1000	70.045667

Calorie/Second to BTU/Hour Conversion Table

Calorie/Second (cal/s)	BTU/Hour (BTU/h)
0.5	7.1382
1	14.276401
2	28.552801
5	71.382003
10	142.764006
15	214.146009
20	285.528012
25	356.910015
50	713.82003
100	1,427.640059
250	3,569.100148
500	7,138.200297
1000	14,276.400593

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/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

Calorie/Second (cal/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

How to Convert BTU/Hour to Calorie/Second

To convert from BTU/Hour (BTU/h) to Calorie/Second (cal/s), multiply the value by 0.0700456669.

Formula: cal/s = BTU/h × 0.0700456669

Reverse: BTU/h = cal/s × 14.276400593

Step-by-Step Example

Start with your value in BTU/Hour. For example: 5 BTU/h
Multiply by the conversion factor: 5 x 0.0700456669
The result is: 0.350228 cal/s

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.

About Calorie/Second

The calorie/second (cal/s) is a unit of power. One calorie/second equals 4.184 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 Calorie/Second are in 1 BTU/Hour?

There are exactly 0.0700456669 Calorie/Second in 1 BTU/Hour. This means the conversion factor from BTU/Hour to Calorie/Second is 0.0700456669.

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

The formula to convert BTU/Hour to Calorie/Second is: cal/s = BTU/h × 0.0700456669. For example, to convert 10 BTU/Hour to Calorie/Second, you would multiply 10 by 0.0700456669.

What is a BTU/Hour?