Actually, I am not sure what the incoming service is. The Master Circuit Breaker for the box is 100amp. I want to put in an electric oven/range. It requires a 50amp breaker be used. My service panel is full, but I do have a 30 amp breaker that I can pull out.(It is for baseboard heaters that don't get used anymore.) My question is: can I add this 50amp circuit to my panel without overloading it? I also have a 35amp for my dryer and a 20amp for my air conditioning. These with all the other things that may or may not be running in my home; are they too much for my system? Thanks in advance, Lurmis

You will most likely be fine, but the only way to tell is with a demand load calculation. It might be worth doing that.
Just Google the term, you'll online calculators for it.