I'm restarting this thread to see how many different calculator features are available and how many of them are know to people

I just noticed :

0x2a in decimal
32 in octal
11 in hex

If you know any different calculator combinations, pour in here

it works too with other commonly used units:

50kg to lbs
3m to feet

(but I can't get a result going from 50kg to feet :P)

"c" (without quotes) shows the speed of light

"c" reminds me of "k" (Boltzmann constant)