🌡️ Watt Kelvin Converter
Convert thermal conductivity units instantly — W/mK, BTU/hr·ft·°F, W/cmK, kcal/hr·m·°C & more
| Unit | In W/mK | In BTU/hr·ft·°F | In kcal/hr·m·°C |
|---|---|---|---|
| 1 W/mK | 1 | 0.5779 | 0.8598 |
| 1 BTU/hr·ft·°F | 1.7307 | 1 | 1.4882 |
| 1 kcal/hr·m·°C | 1.163 | 0.6719 | 1 |
| 1 W/cmK | 100 | 57.79 | 85.98 |
| 1 cal/s·cm·°C | 418.68 | 241.9 | 360 |
| 1 mW/mK | 0.001 | 0.0005779 | 0.0008598 |
| 1 BTU·in/hr·ft²·°F | 0.1442 | 0.0833 | 0.1240 |
| 1 W/mmK | 1000 | 577.9 | 859.8 |
| Material | W/mK | BTU/hr·ft·°F | Category |
|---|---|---|---|
| Silver | 429 | 247.9 | Metal |
| Copper | 385 | 222.6 | Metal |
| Gold | 318 | 183.8 | Metal |
| Aluminum | 205 | 118.5 | Metal |
| Iron | 72 | 41.6 | Metal |
| Carbon Steel | 50 | 28.9 | Metal/Alloy |
| Stainless Steel | 16 | 9.25 | Metal/Alloy |
| Lead | 35 | 20.2 | Metal |
| Concrete | 1.7 | 0.98 | Building |
| Glass | 1.05 | 0.61 | Building |
| Brick | 0.72 | 0.42 | Building |
| Water (20°C) | 0.60 | 0.35 | Liquid |
| Wood (pine) | 0.12 | 0.069 | Natural |
| Foam Insulation | 0.04 | 0.023 | Insulator |
| Fiberglass Batts | 0.04 | 0.023 | Insulator |
| Air (still, 25°C) | 0.026 | 0.015 | Gas |
| From Unit | Symbol | Factor to W/mK | Example: Copper |
|---|---|---|---|
| Watt per meter-Kelvin | W/mK | × 1 | 385 W/mK |
| Watt per cm-Kelvin | W/cmK | × 100 | 3.85 W/cmK |
| Watt per mm-Kelvin | W/mmK | × 1000 | 0.385 W/mmK |
| BTU/hr·ft·°F | BTU/hr·ft·°F | × 1.7307 | 222.5 BTU/hr·ft·°F |
| BTU·in/hr·ft²·°F | BTU·in/hr·ft²·°F | × 0.1442 | 2670 BTU·in/hr·ft²·°F |
| kcal/hr·m·°C | kcal/hr·m·°C | × 1.163 | 331 kcal/hr·m·°C |
| cal/s·cm·°C | cal/s·cm·°C | × 418.68 | 0.920 cal/s·cm·°C |
| milliwatt per meter-Kelvin | mW/mK | × 0.001 | 385000 mW/mK |
Watt-kelvin converters are handy online tools that ease the change between various units that involve watts and kelvins. Those conversions mostly involve thermal resistance and thermal conductivity so it is ways to measure how heat moves through materials.
The units of the SI system for thermal resistance is kelvins per watt. One can write them also as degrees Celsius per watt. An interesting fact is that one kelvin per watt matches one degree Celsius per watt.
Using Online Watt and Kelvin Converters
Hence 1 K/W equals 1 °C/W. This simplifies the conversion between those two, because the values do not change.
The opposite direction works equally well. One degree Celsius per watt matches one kelvin per watt. Websites with converters allow folks to swtich quickly between Celsius/watt and kelvin/watt.
Also available are links about conversions for those that want to check the details.
There are also free online tools that convert kelvins per watt to degrees Fahrenheit-hours per BTU. They work for the thermochemical BTU and for the IT version of BTU. Those tools give links about results and step-by-step guidelines.
They allow users too research other units of thermal resistance, than only those two.
Thermal conductivity is a related idea. It uses watts per kelvin. Material with conductivity of 1 watt per metre per kelvin passes 1 watt of heat through 1 metre of thickness, when the temperature difference between two sides is 1 kelvin.
That assumes stable one-dimensional heat flow.
Some pages online also deal with conversion between watt-second and kelvin. They are different kinds of measures, and one uses multiplication factors for switching between them. The conversion goes both ways, from kelvin to watt-second or vice versa.
Here something useful to know about kelvins and Celsius alone. The Celsius scale defines the freezing point of water. The triple point of water sits at 0.01 degrees Celsius.
Hence the conversion between kelvin and Celsius shows that 0 °C matches 273.15 K.
One must remember that kelvins and brightness levels cannot convert directly. Black and bright LED lights with kelvins happen for every color temperature. So it is almost impossible to go directly from kelvins to brightness levels either.
Converting light flow in brightness levels to electrical energy in watts is anentirely other matter.
Most of those converters work the same way. You enter the number, and the result shows right away. Those websites with converters allow fast and precise change between many units, going from one system to another without trouble.
