Yup. Unclear if it will be back. Add your voice to the forum/opine away to help it return?
http://forums.groundspeak.com/GC/index.php?showtopic=335611
Post #5 from Moun10Bike:
Posted <abbr class=”published” title=”2015-10-23T17:23:17+00:00″>23 October 2015 – 10:23 AM</abbr>
It looks like we failed on communication of this change and for that we apologize. The plug-in that did that conversion was built on 32-bit code and we are trying to get the site up to full 64-bit code for security and performance reasons. We looked at the analytics for the conversion page and saw that it was only getting used around 100 times per day (which is quite small given our active user base), so we felt that it was safe to pull it. Obviously, we underestimated the impact this would have.
We are now in discussions on how to proceed. In the meantime, I would suggest that people try out some of the third-party conversion tools out there. My personal favorite is fizzymagic’s FizzyCalc. For an online tool, I have used Earth Point.
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Our go-to for many things is GPSVisualizer’s Calculator section, but it’s a pain v. the simplicity of what was right on the cache page:
http://www.gpsvisualizer.com/calculators