# Crappy temperature conversion

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### Crappy temperature conversion

How do I convert [Btu/hr.ft^2.F]^-1 to [m^2.K/W]^-1?
Guest

### Thermal Conductivity

Given that both your units are raised to the power of -1, this is the same as inverting both (i.e. reciprocal).
This would make the metric one W/mÂĠÂḞK. This has Watts (unit of power or rate of energy flow) on the top, whereas the imperial one would have Btu/hr (also rate of energy flow) on the bottom. So I think you have one too many ^-1 in there.
These look like units connected to thermal conductivity to me so I would assume that what you are probably after is Btu/hr.ftÂĠ.ÂḞF to [mÂĠ.ÂḞK/W]^-1. If the ^-1 is truly applied to the imperial unit rather than the metric then divide by the factor below rather than multiply.
As mentioned above [mÂĠ.ÂḞK/W]^-1 is the same as W/mÂĠÂḞK, so to convert Btu/hr to Watts multiply by 0.2931. Because the ftÂĠ, mÂĠ, ÂḞF and ÂḞK are at the bottom you divide by 0.3048ÂĠ and 0.5556 respectively. Putting this lot together gives you:
0.2931/(0.3048ÂĠ x 0.5556) = 5.6784
Guest

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