Ah, interesting - this NIST page uses °R, which is at odds with the explanation in the other page on Kelvin (which doesn’t mention Rankine). I’m not sure if tha

Ah, interesting - this NIST page uses °R, which is at odds with the explanation in the other page on Kelvin (which doesn’t mention Rankine). I’m not sure if that’s because there’s a strong convention to use the degree symbol with Rankine or if there’s an additional reason not mentioned by the Kelvin page https://www.nist.gov/pml/special-publication-811/nist-guide-si-appendix-b-conversion-factors/nist-guide-si-appendix-b8 https://www.nist.gov/pml/special-publication-811/nist-guide-...