Convert 5 BTU/Hour (BTU/h) to BTU/Second (BTU/s).

5 BTU/Hour equals 0.001389 BTU/Second. Multiply 5 by 0.0002777778.

5 BTU/Hour = 0.001389 BTU/Second

Worked example: converting BTU/Hour to BTU/Second

Step 1 — start with the formula. BTU/s = BTU/h × 0.0002777778
Step 2 — substitute your figure. 5 BTU/h × 0.0002777778
Step 3 — read the result. 5 BTU/h = 0.001389 BTU/s
Step 4 — check it in reverse. BTU/h = BTU/s × 3,600 returns 5.0004 BTU/h, which matches the figure you started with.

Power Converter

22 units available

Decimals:

From

To

0.001389

5 BTU/h = 0.001389 BTU/s

Formula:

BTU/s = BTU/h × 0.0002777778

With your value: 5 BTU/h = 0.00138889 BTU/s

How big is that?

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

Your value5.00 BTU/h

LED bulb (6.1× your value)30.7 BTU/h

Laptop (44× your value)222 BTU/h

Microwave oven (6.8e+2× your value)3.41e+3 BTU/h

Electric kettle (2.0e+3× your value)1.02e+4 BTU/h

Family car engine (6.1e+4× your value)3.07e+5 BTU/h

Other BTU/Hour to BTU/Second conversions

1 BTU/h to BTU/s 2 BTU/h to BTU/s 3 BTU/h to BTU/s 4 BTU/h to BTU/s 6 BTU/h to BTU/s 7 BTU/h to BTU/s 8 BTU/h to BTU/s Full BTU/Hour to BTU/Second converter

BTU/Hour to BTU/Second Conversion Table

BTU/Hour (BTU/h)	BTU/Second (BTU/s)
0.5	0.000139
1	0.000278
2	0.000556
5	0.001389
10	0.002778
15	0.004167
20	0.005556
25	0.006944
50	0.013889
100	0.027778
250	0.069444
500	0.138889
1000	0.277778

BTU/Second to BTU/Hour Conversion Table

BTU/Second (BTU/s)	BTU/Hour (BTU/h)
0.5	1,800
1	3,600
2	7,200
5	18,000
10	36,000
15	54,000
20	72,000
25	90,000
50	180,000
100	360,000
250	900,000
500	1,800,000
1000	3,600,000

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.

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

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

How to Convert BTU/Hour to BTU/Second

To convert from BTU/Hour (BTU/h) to BTU/Second (BTU/s), multiply the value by 0.0002777778.

Formula: BTU/s = BTU/h × 0.0002777778

Reverse: BTU/h = BTU/s × 3,600

Step-by-Step Example

Start with your value in BTU/Hour. For example: 5 BTU/h
Multiply by the conversion factor: 5 x 0.0002777778
The result is: 0.001389 BTU/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 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.

Frequently Asked Questions

What is 5 BTU/Hour in BTU/Second?

5 BTU/Hour equals 0.001389 BTU/Second.

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

There are exactly 0.0002777778 BTU/Second in 1 BTU/Hour. This means the conversion factor from BTU/Hour to BTU/Second is 0.0002777778.

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

The formula to convert BTU/Hour to BTU/Second is: BTU/s = BTU/h × 0.0002777778. For example, to convert 10 BTU/Hour to BTU/Second, you would multiply 10 by 0.0002777778.

What is a BTU/Hour?