Convert Watts per Meter-Kelvin to BTU per Hour-Foot-Fahrenheit
Instantly convert Watts per Meter-Kelvin (W/(m·K)) to BTU per Hour-Foot-Fahrenheit (BTU/(hr·ft·°F)) with our free online calculator.
Formula: W/(m·K) to BTU/(hr·ft·°F) — multiply by 0.577791
Reference Table
| Watts per Meter-Kelvin (W/(m·K)) | BTU per Hour-Foot-Fahrenheit (BTU/(hr·ft·°F)) |
|---|---|
| 1 | 0.577791 |
| 5 | 2.88895 |
| 10 | 5.77791 |
| 25 | 14.4448 |
| 50 | 28.8895 |
| 100 | 57.7791 |
How to Convert Watts per Meter-Kelvin to BTU per Hour-Foot-Fahrenheit
Formula
To convert Watts per Meter-Kelvin (W/(m·K)) to BTU per Hour-Foot-Fahrenheit (BTU/(hr·ft·°F)): multiply by 0.577791
Step-by-Step
- Start with your value in Watts per Meter-Kelvin (W/(m·K)).
- Multiply by 0.577791 to perform the conversion.
- The result is your value expressed in BTU per Hour-Foot-Fahrenheit (BTU/(hr·ft·°F)).
Conversion Factor
1 W/(m·K) = 0.577791 BTU/(hr·ft·°F)
Reverse Factor
1 BTU/(hr·ft·°F) = 1.73073 W/(m·K)
Worked Example
Convert 25 Watts per Meter-Kelvin to BTU per Hour-Foot-Fahrenheit: 25 W/(m·K) = 14.4448 BTU/(hr·ft·°F)
About Watt per Meter-Kelvin (W/(m·K))
The SI unit of thermal conductivity k (ISO 80000-5 §5-9) — the rate of heat flow through a unit thickness of material per unit cross-sectional area per unit temperature gradient, defined by Fourier's law of heat conduction q = −k·∇T. W/(m·K) is the universal reference for steady-state and transient heat-conduction calculations, material selection for thermal management, building-envelope insulation design, and thermal-interface-material specification. Reference values per ASM Handbook and NIST: silver 429 W/(m·K, the highest of common metals); copper 401; aluminum 237; brass 109; carbon steel 50; stainless 304 16; titanium Ti-6Al-4V 6.7; glass 1.0; concrete 1.0-1.7; wood 0.12-0.17 (parallel to grain) / 0.04-0.05 (perpendicular); air at 25 °C 0.026 (this single value is why fiberglass / cellulose / aerogel insulation work — they immobilize air); polystyrene foam (EPS, XPS) 0.030-0.040; fiberglass batt 0.040; aerogel (Aspen Spaceloft) 0.015 — the lowest of common engineering materials. Every CFD solver, thermal-analysis tool (Ansys Mechanical Thermal, COMSOL Heat Transfer, ABAQUS), and building-energy simulation (EnergyPlus, IES VE, DesignBuilder per ASHRAE 90.1 compliance) uses W/(m·K).
About BTU per Hour-Foot-Fahrenheit (BTU/(hr·ft·°F))
An imperial thermal-conductivity unit (≈ 1.7307 W/(m·K) per NIST SP 811) used in US HVAC engineering, building-envelope thermal design per ASHRAE 90.1, refrigeration system design, and petroleum-engineering reservoir heat-flow analysis (steam-flood and CSS thermal EOR per SPE technical literature). Reference values in US-edition engineering handbooks: copper 231 BTU/(hr·ft·°F), steel 26, concrete 0.8, wood 0.07, fiberglass batt insulation 0.025, expanded polystyrene 0.020, aerogel 0.009. US-edition heat-transfer textbooks (Holman, Incropera-DeWitt with US-customary tables) include thermal-conductivity property tables in BTU/(hr·ft·°F) alongside W/(m·K). The unit also appears in ASHRAE Standard 90.1 prescriptive R-value tables (where R-value = thickness / k), in petroleum-reservoir simulation property cards (CMG STARS), and in pre-2000 ASHRAE Handbook editions. Convert BTU/(hr·ft·°F) to W/(m·K) by multiplying by 1.7307; to BTU·in/(hr·ft²·°F) by multiplying by 12.
Quick Facts
- 1 Watt per Meter-Kelvin equals 0.577791 BTU per Hour-Foot-Fahrenheit
- 1 BTU per Hour-Foot-Fahrenheit equals 1.73073 Watts per Meter-Kelvin
- Watt per Meter-Kelvin is a unit of thermal conductivity
- BTU per Hour-Foot-Fahrenheit is a unit of thermal conductivity
- This conversion is commonly used in insulation design, heat exchanger engineering, and material science
- The Watt per Meter-Kelvin belongs to the metric system
- The BTU per Hour-Foot-Fahrenheit belongs to the imperial system
Common Watt per Meter-Kelvin to BTU per Hour-Foot-Fahrenheit Conversions
| Watts per Meter-Kelvin (W/(m·K)) | BTU per Hour-Foot-Fahrenheit (BTU/(hr·ft·°F)) |
|---|---|
| 0.01 | 0.00577791 |
| 0.1 | 0.0577791 |
| 0.25 | 0.144448 |
| 0.5 | 0.288895 |
| 1 | 0.577791 |
| 2 | 1.15558 |
| 3 | 1.73337 |
| 5 | 2.88895 |
| 10 | 5.77791 |
| 15 | 8.66686 |
| 20 | 11.5558 |
| 25 | 14.4448 |
| 50 | 28.8895 |
| 75 | 43.3343 |
| 100 | 57.7791 |
| 250 | 144.448 |
| 500 | 288.895 |
| 1000 | 577.791 |
| 5000 | 2888.95 |
| 10000 | 5777.91 |
Understanding Watts per Meter-Kelvin
The Watt per Meter-Kelvin (symbol: W/(m·K)) is a unit of thermal conductivity. The SI unit of thermal conductivity k (ISO 80000-5 §5-9) — the rate of heat flow through a unit thickness of material per unit cross-sectional area per unit temperature gradient, defined by Fourier's law of heat conduction q = −k·∇T. W/(m·K) is the universal reference for steady-state and transient heat-conduction calculations, material selection for thermal management, building-envelope insulation design, and thermal-interface-material specification. Reference values per ASM Handbook and NIST: silver 429 W/(m·K, the highest of common metals); copper 401; aluminum 237; brass 109; carbon steel 50; stainless 304 16; titanium Ti-6Al-4V 6.7; glass 1.0; concrete 1.0-1.7; wood 0.12-0.17 (parallel to grain) / 0.04-0.05 (perpendicular); air at 25 °C 0.026 (this single value is why fiberglass / cellulose / aerogel insulation work — they immobilize air); polystyrene foam (EPS, XPS) 0.030-0.040; fiberglass batt 0.040; aerogel (Aspen Spaceloft) 0.015 — the lowest of common engineering materials. Every CFD solver, thermal-analysis tool (Ansys Mechanical Thermal, COMSOL Heat Transfer, ABAQUS), and building-energy simulation (EnergyPlus, IES VE, DesignBuilder per ASHRAE 90.1 compliance) uses W/(m·K).
It belongs to the metric measurement system.
Watts per Meter-Kelvin are commonly used in insulation design, heat exchanger engineering, and material science.
Understanding BTU per Hour-Foot-Fahrenheit
The BTU per Hour-Foot-Fahrenheit (symbol: BTU/(hr·ft·°F)) is a unit of thermal conductivity. An imperial thermal-conductivity unit (≈ 1.7307 W/(m·K) per NIST SP 811) used in US HVAC engineering, building-envelope thermal design per ASHRAE 90.1, refrigeration system design, and petroleum-engineering reservoir heat-flow analysis (steam-flood and CSS thermal EOR per SPE technical literature). Reference values in US-edition engineering handbooks: copper 231 BTU/(hr·ft·°F), steel 26, concrete 0.8, wood 0.07, fiberglass batt insulation 0.025, expanded polystyrene 0.020, aerogel 0.009. US-edition heat-transfer textbooks (Holman, Incropera-DeWitt with US-customary tables) include thermal-conductivity property tables in BTU/(hr·ft·°F) alongside W/(m·K). The unit also appears in ASHRAE Standard 90.1 prescriptive R-value tables (where R-value = thickness / k), in petroleum-reservoir simulation property cards (CMG STARS), and in pre-2000 ASHRAE Handbook editions. Convert BTU/(hr·ft·°F) to W/(m·K) by multiplying by 1.7307; to BTU·in/(hr·ft²·°F) by multiplying by 12.
It belongs to the imperial measurement system.
BTU per Hour-Foot-Fahrenheit are commonly used in insulation design, heat exchanger engineering, and material science.
Why Convert Watts per Meter-Kelvin to BTU per Hour-Foot-Fahrenheit?
Converting between Watts per Meter-Kelvin and BTU per Hour-Foot-Fahrenheit is a frequent requirement for engineers, scientists, and students working with thermal conductivity values. Different industries and regions favour different unit systems, so having a dependable conversion tool saves time and prevents errors in technical calculations. Whether you are verifying a specification sheet, cross-checking simulation results, or preparing a report for an international audience, accurate thermal conductivity conversion is essential.
Frequently Asked Questions
How do I convert Watts per Meter-Kelvin to BTU per Hour-Foot-Fahrenheit?
The SI unit of thermal conductivity k (ISO 80000-5 §5-9) — the rate of heat flow through a unit thickness of material per unit cross-sectional area per unit temperature gradient, defined by Fourier's law of heat conducti... To convert Watts per Meter-Kelvin to BTU per Hour-Foot-Fahrenheit, multiply by 0.577791. For example, 25 W/(m·K) equals 14.4448 BTU/(hr·ft·°F).
How many BTU per Hour-Foot-Fahrenheit are in 1 Watt per Meter-Kelvin?
There are 0.577791 BTU per Hour-Foot-Fahrenheit in 1 Watt per Meter-Kelvin.
How many Watts per Meter-Kelvin are in 1 BTU per Hour-Foot-Fahrenheit?
There are 1.73073 Watts per Meter-Kelvin in 1 BTU per Hour-Foot-Fahrenheit.
What is the formula for Watt per Meter-Kelvin to BTU per Hour-Foot-Fahrenheit conversion?
The formula is: multiply by 0.577791. This means 1 W/(m·K) = 0.577791 BTU/(hr·ft·°F).
Is a Watt per Meter-Kelvin bigger than a BTU per Hour-Foot-Fahrenheit?
Yes. One Watt per Meter-Kelvin is larger than one BTU per Hour-Foot-Fahrenheit because 1 W/(m·K) equals 0.577791 BTU/(hr·ft·°F), which is less than 1.
When do you need to convert between Watts per Meter-Kelvin and BTU per Hour-Foot-Fahrenheit?
An imperial thermal-conductivity unit (≈ 1. Watt per Meter-Kelvin and BTU per Hour-Foot-Fahrenheit are both thermal conductivity units, so conversion comes up whenever one source of information uses one unit and another uses the other — a classic cross-reference challenge in engineering, trade, travel, and everyday life.