What is the average weight of a spaceship?

Spacecraft are the smallest type of space vessel, rarely topping 50 tons in weight. Vessels of this category usually carry less than 20 crewmen. A Light Spacecraft is between .5 and 5 tons in weight, and carries only one crewman. A Medium Spacecraft weighs between 5 tons and 15 tons, and requires between two and five crewmen. A Heavy Spacecraft weighs between 15 and 50 tons, and requires between five and twenty crewmen. A spacecraft is incapable of interstellar travel.

A spaceship is typically larger than a spacecraft, typically above 40 tons in weight. A Light Spaceship weighs between 40 and 100 tons and requires ten to thirty crewman. A Medium Spaceship weighs between 100 and 1000 tons and requires twenty to five-hundred crewmen. A Heavy Spaceship weighs more than 1000 tons and requires over five-hundred crewmen to operate. A Spaceship is incapable of interstellar travel.

[ members.aol.com/noctifer03/private/Abyss/Technology/Vehicles/Space/overview.html ]
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The ship's weight is proportional to the force of gravity acting on it. That depends on its mass, the masses of nearby objects (such as planets, asteroids, stars and so on) and its distance from those objects.
This is very unlikely to be zero.

According to William Shatner on The History Channel last night, The Enterprise weighed 4 Billion tons. According to this site:

NCC-1701-D "T.N.G. Enterprise"
Maxium Speed;Warp Fator 9.6
length: 642,5m;
width: 467m;
hight: 137,5m;
wight: 397.805mt
42 decks
Crew: officers: 185;crew: 575; civilists: 252
Crusing Speed;Warp Factor6.0
Phaser Banks12
Photon Torpedoes 1 forward , 1 aft;(luanchers, not ammo)

[ mario.lapam.mo.it/enterpri/1701-d.htm no longer exists ]

According to this site:
80,000 metric tons.
http://www.scifispace.com/html/stenterprise.php

Any answer is suitable. It is all make-believe. Ask Fred Rogers.

If I see a first response on any question that does not attempt an actual answer to that question, it will be removed. Requests for clarification, an assumption that there is no way to answer this question, far-fetched guesses, etc., all knock the question out of unanswered status and greatly increase the chances for the question to go unanswered altogether.

In this instance, we do not know why monkeyyay is requesting this information or what he considers a spaceship to be, so the actual weight of any space-going craft may be of value to him, even if it is a fictional craft.

However, I think you are referring to your reply to Q#64918 which is still there and would have been removed had monkeyyay not already rephrased his question trying to get a useable answer. The second answer there is the classifications of space vehicles from a computer game called 'The Abyss' which must not have been what he wanted.