Convert??? The world should see how right the Fahrenheit system is! Lets look at how we experience the various scales:
0F -- very cold. 100F -- very hot.
0C -- cold. 100C -- dead.
0K -- dead. 100K -- dead.
0R -- dead. 100R -- dead.
What's more useful??
I find the one scaled to the boiling and freezing points of water at STP to be most useful.