[Andrés]

I finished with the estimation of starship tonnages (I'll post them later)
and because of the wide range in tonnages, now I need to define a variable scale so it's possible to adapt them to space empires tonnages.

What about this one:

Fighters will be amplified 1000 times so a 1 ton in a fighter will becom 1 kt in seiv.

Smallest non-fighter ships. I sci-fi about 1000 tons in seiv 120 kt

Medium sized ships 200-2000 kt will be converted straight, making 1000 tons = 1 kt

Very big and impressive ship. But small and cheap enough that a powerful race is able to build in large numbers. Ships such as Minbari Sharlins, Earth Omegas and Imperial Star Destroyers should be close to this tonnage.
sci-fi tonnage: 50000
seiv tonnage: 5000

This ship is unconceibably big. Having the avility to build one of these babies is a show of power, and probably a provocation to other races. Ships such as an Imperial Eclipse Star Destroyer and a Vorlon Planet Killer should be close to this tonnage.
sci-fi tonnage: 30000000
seiv tonnage: 20000

The biggest thing ever built, and the maximun alowed tonnage: the Death Star.
Estimated tonnage: 320000000000 kt
seiv tonnage: 65535 kt

Do you agree with these values? Do you think that seiv tonnages fit the description?
Would it be practical to build 5000 kt ships and would the 2200 kt biggest Trek starships be able to handle them. The 2200 kt value is rounded down to keep a coherent scale and have contrast between sizes, they are reduced to more than 1/2 when the others are reduced to 1/10th of their real tonnage.