Convert 45 BTU/Hour-Foot-°F (BTU/(h·ft·°F)) to Milliwatt/Meter-Kelvin (mW/(m·K)).

45 BTU/Hour-Foot-°F equals 77,883.05997 Milliwatt/Meter-Kelvin. Multiply 45 by 1,730.734666.

45 BTU/Hour-Foot-°F to Milliwatt/Meter-Kelvin

45 BTU/Hour-Foot-°F (BTU/(h·ft·°F)) equals

77,883.05997 mW/(m·K)

45 × 1,730.734666 = 77,883.05997 Milliwatt/Meter-Kelvin

Convert BTU/Hour-Foot-°F (BTU/(h·ft·°F)) to Milliwatt/Meter-Kelvin (mW/(m·K)) instantly. 1 BTU/(h·ft·°F) = 1,730.734666 mW/(m·K).

Worked example: converting BTU/Hour-Foot-°F to Milliwatt/Meter-Kelvin

Step 1 — start with the formula. mW/(m·K) = BTU/(h·ft·°F) × 1,730.734666
Step 2 — substitute your figure. 45 BTU/(h·ft·°F) × 1,730.734666
Step 3 — read the result. 45 BTU/(h·ft·°F) = 77,883.05997 mW/(m·K)
Step 4 — check it in reverse. BTU/(h·ft·°F) = mW/(m·K) × 0.0005777893 returns Invalid BTU/(h·ft·°F), which matches the figure you started with.

Thermal Conductivity Converter

7 units available

Decimals:

From

77,883.05997

45 BTU/(h·ft·°F) = 77,883.05997 mW/(m·K)

Formula:

mW/(m·K) = BTU/(h·ft·°F) × 1,730.734666

With your value: 45 BTU/(h·ft·°F) = 77,883.05997 mW/(m·K)

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

36 BTU/(h·ft·°F) to mW/(m·K)38 BTU/(h·ft·°F) to mW/(m·K)40 BTU/(h·ft·°F) to mW/(m·K)42 BTU/(h·ft·°F) to mW/(m·K)48 BTU/(h·ft·°F) to mW/(m·K)50 BTU/(h·ft·°F) to mW/(m·K)55 BTU/(h·ft·°F) to mW/(m·K)Full BTU/Hour-Foot-°F to Milliwatt/Meter-Kelvin converter

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

BTU/Hour-Foot-°F (BTU/(h·ft·°F))	Milliwatt/Meter-Kelvin (mW/(m·K))
0.5	865.367333
1	1,730.734666
2	3,461.469332
5	8,653.67333
10	17,307.34666
15	25,961.01999
20	34,614.69332
25	43,268.36665
50	86,536.7333
100	173,073.4666
250	432,683.6665
500	865,367.333
1000	1,730,734.666

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

Milliwatt/Meter-Kelvin (mW/(m·K))	BTU/Hour-Foot-°F (BTU/(h·ft·°F))
0.5	0.000289
1	0.000578
2	0.001156
5	0.002889
10	0.005778
15	0.008667
20	0.011556
25	0.014445
50	0.028889
100	0.057779
250	0.144447
500	0.288895
1000	0.577789

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-Foot-°F (BTU/(h·ft·°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/Hour-Foot-°F to Milliwatt/Meter-Kelvin

To convert from BTU/Hour-Foot-°F (BTU/(h·ft·°F)) to Milliwatt/Meter-Kelvin (mW/(m·K)), multiply the value by 1,730.734666.

Formula: mW/(m·K) = BTU/(h·ft·°F) × 1,730.734666

Reverse: BTU/(h·ft·°F) = mW/(m·K) × 0.0005777893

Step-by-Step Example

Start with your value in BTU/Hour-Foot-°F. For example: 5 BTU/(h·ft·°F)
Multiply by the conversion factor: 5 x 1,730.734666
The result is: 8,653.67333 mW/(m·K)

About BTU/Hour-Foot-°F

The btu/hour-foot-°f (BTU/(h·ft·°F)) is a unit of thermal conductivity. One btu/hour-foot-°f equals 1.730734666 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

What is 45 BTU/Hour-Foot-°F in Milliwatt/Meter-Kelvin?

45 BTU/Hour-Foot-°F equals 77,883.05997 Milliwatt/Meter-Kelvin.

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

There are exactly 1,730.734666 Milliwatt/Meter-Kelvin in 1 BTU/Hour-Foot-°F. This means the conversion factor from BTU/Hour-Foot-°F to Milliwatt/Meter-Kelvin is 1,730.734666.

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

The formula to convert BTU/Hour-Foot-°F to Milliwatt/Meter-Kelvin is: mW/(m·K) = BTU/(h·ft·°F) × 1,730.734666. For example, to convert 10 BTU/Hour-Foot-°F to Milliwatt/Meter-Kelvin, you would multiply 10 by 1,730.734666.

What is a BTU/Hour-Foot-°F?

What is a Milliwatt/Meter-Kelvin?

What are the common uses of BTU/Hour-Foot-°F?

The BTU/Hour-Foot-°F is commonly used in thermal conductivity calculations, engineering and science, education.

Related Thermal Conductivity Conversions

Watt/Meter-Kelvin → Milliwatt/Meter-Kelvin Kilowatt/Meter-Kelvin → Milliwatt/Meter-Kelvin Calorie/Second-Centimeter-°C → Milliwatt/Meter-Kelvin Kilocalorie/Hour-Meter-°C → Milliwatt/Meter-Kelvin BTU/Hour-Foot-°F → Watt/Meter-Kelvin BTU/Hour-Foot-°F → Kilowatt/Meter-Kelvin BTU/Hour-Foot-°F → Calorie/Second-Centimeter-°C BTU/Hour-Foot-°F → Kilocalorie/Hour-Meter-°C BTU/Hour-Foot-°F → BTU-Inch/Hour-sq Foot-°F

Cite this page

UnitConvertLab. (2026). 45 BTU/Hour-Foot-°F to Milliwatt/Meter-Kelvin. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/45-btu_per_h_ft_f-to-milliwatt_per_meter_k