How many labels are defined in ARINC 429 for calibrated altitude?
There is no defined "calibrated altitude". 
The following are all altitude related labels:


102 Selected Altitude,
107 Selected Cruise Altitude,
120 Range to Altitude,
127 Selected Landing Altitude,
131 Intruder Altitude,
144 Altitude Error,
153 Max Altitude,
162 Density Altitude,
164 Min Descent Altitude (MDA),
203 Altitude,
204 Baro Corrected Altitude #1 &amp; Baro Altitude,
206 Altitude (Variable Resolution),
212 Altitude Rate,
220 Baro Corrected Altitude #2,
225 Compensated Altitude Rate,
251 Baro Corrected Altitude #3,
252 Baro Corrected Altitude #4,
254 Altitude Rate,
323 Geometric Altitude,
361 Altitude (Inertial)