Here is a basic version of the calculator:
https://docs.google.com/spreadsheets/d/1UsHvVjbrv_-8xpHxWvaAI1jqgWoxGOUzT0f4puCIWrE
I have other fuel calculators I've made. They include - multiple trips (including at different warp speeds on different turns, e.g. overdriving engines one turn) - guessing how much fuel the opponent has on board (based on assumptions about cargo) - knowing the empty mass of a ship, if you know its weapons. (Can be useful to let you know if a ship is empty of fuel).
In principle, here are things you can determine about a ship, if you know what weapons it has and can observe its mass (e.g. over 2 turns). - the min/max empty mass a ship class can have - the empty mass of ship, based on weapons it has - How much total mass it is carrying (fuel and cargo combined) - minimum amount of cargo or fuel on board - maximum amount of cargo or fuel on board - how far a ship can travel at a given warp speed - max cargo a ship can carry if traveling a given distance at a given warp speed - (If you know distance travelled), you can infer his mass before departure - (if you know mass before departure), you can infer how many kit of fuel/cargo were transferred that turn |