BTU-Inch/Hour-sq Foot-°F to Milliwatt/Meter-Kelvin Converter

Thermal Conductivity Converter

7 units available

Decimals:

From

To

144.227889

1 BTU·in/(h·ft²·°F) = 144.227889 mW/(m·K)

Formula:

mW/(m·K) = BTU·in/(h·ft²·°F) × 144.2278889

With your value: 1 BTU·in/(h·ft²·°F) = 144.2278889 mW/(m·K)

Other BTU-Inch/Hour-sq Foot-°F to Milliwatt/Meter-Kelvin conversions

2 BTU·in/(h·ft²·°F) to mW/(m·K)3 BTU·in/(h·ft²·°F) to mW/(m·K)4 BTU·in/(h·ft²·°F) to mW/(m·K)5 BTU·in/(h·ft²·°F) to mW/(m·K)6 BTU·in/(h·ft²·°F) to mW/(m·K)7 BTU·in/(h·ft²·°F) to mW/(m·K)8 BTU·in/(h·ft²·°F) to mW/(m·K)

BTU-Inch/Hour-sq Foot-°F to Milliwatt/Meter-Kelvin Conversion Table

BTU-Inch/Hour-sq Foot-°F (BTU·in/(h·ft²·°F))	Milliwatt/Meter-Kelvin (mW/(m·K))
0.5	72.113944
1	144.227889
2	288.455778
5	721.139444
10	1,442.278889
15	2,163.418334
20	2,884.557778
25	3,605.697223
50	7,211.394445
100	14,422.78889
250	36,056.972225
500	72,113.94445
1000	144,227.8889

Milliwatt/Meter-Kelvin to BTU-Inch/Hour-sq Foot-°F Conversion Table

Milliwatt/Meter-Kelvin (mW/(m·K))	BTU-Inch/Hour-sq Foot-°F (BTU·in/(h·ft²·°F))
0.5	0.003467
1	0.006933
2	0.013867
5	0.034667
10	0.069335
15	0.104002
20	0.138669
25	0.173337
50	0.346674
100	0.693347
250	1.733368
500	3.466736
1000	6.933472

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-Inch/Hour-sq Foot-°F (BTU·in/(h·ft²·°F))

Thermal Conductivity

Exact conversion

Derived quantity, watt per metre-kelvin (W/(m·K)). Imperial and calorie-based units convert exactly via the thermochemical calorie and the international BTU.

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

Milliwatt/Meter-Kelvin (mW/(m·K))

Thermal Conductivity

Exact conversion

Derived quantity, watt per metre-kelvin (W/(m·K)). Imperial and calorie-based units convert exactly via the thermochemical calorie and the international BTU.

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-Inch/Hour-sq Foot-°F to Milliwatt/Meter-Kelvin

To convert from BTU-Inch/Hour-sq Foot-°F (BTU·in/(h·ft²·°F)) to Milliwatt/Meter-Kelvin (mW/(m·K)), multiply the value by 144.2278889.

Formula: mW/(m·K) = BTU·in/(h·ft²·°F) × 144.2278889

Reverse: BTU·in/(h·ft²·°F) = mW/(m·K) × 0.0069334718

Step-by-Step Example

Start with your value in BTU-Inch/Hour-sq Foot-°F. For example: 5 BTU·in/(h·ft²·°F)
Multiply by the conversion factor: 5 x 144.2278889
The result is: 721.139444 mW/(m·K)

About BTU-Inch/Hour-sq Foot-°F

The btu-inch/hour-sq foot-°f (BTU·in/(h·ft²·°F)) is a unit of thermal conductivity. One btu-inch/hour-sq foot-°f equals 0.1442278889 base units. UnitConvertLab converts it against every other thermal conductivity unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: thermal conductivity calculations, engineering and science, education.

About Milliwatt/Meter-Kelvin

The milliwatt/meter-kelvin (mW/(m·K)) is a unit of thermal conductivity. One milliwatt/meter-kelvin equals 0.001 base units. UnitConvertLab converts it against every other thermal conductivity unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: thermal conductivity calculations, engineering and science, education.

Frequently Asked Questions

How many Milliwatt/Meter-Kelvin are in 1 BTU-Inch/Hour-sq Foot-°F?

There are exactly 144.2278889 Milliwatt/Meter-Kelvin in 1 BTU-Inch/Hour-sq Foot-°F. This means the conversion factor from BTU-Inch/Hour-sq Foot-°F to Milliwatt/Meter-Kelvin is 144.2278889.

What is the formula to convert BTU-Inch/Hour-sq Foot-°F to Milliwatt/Meter-Kelvin?

The formula to convert BTU-Inch/Hour-sq Foot-°F to Milliwatt/Meter-Kelvin is: mW/(m·K) = BTU·in/(h·ft²·°F) × 144.2278889. For example, to convert 10 BTU-Inch/Hour-sq Foot-°F to Milliwatt/Meter-Kelvin, you would multiply 10 by 144.2278889.

What is a BTU-Inch/Hour-sq Foot-°F?