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Mojomoe Commander
Joined: 10 Apr 2010 Posts: 442 Location: Seattle, WA

Posted: Sun Aug 19, 2018 11:54 am Post subject: FFG ship stat conversion 


Heya folks 
One of the things I’ve been working on for a while for my own entertainment is a method of converting FFG’s ship stats to D6, mostly because it seemed like the systems were too different and it couldn’t be done. I’ve recently come up with a system of conversion, and I wonder if that’s something anyone would be interested in?
I’d be happy to post it here if so.
It’s certainly different from conversion between D20/SAGA and D6, in that the math behind the conversions isn’t nearly so straightforward. I’ve had to use some pretty complicated equations to plot what on some cases are either exponential, logarithmic, or polynomial coefficients, but I think I’ve got a pretty solid matrix. 

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Whill Supreme Chancellor (Owner/Admin)
Joined: 14 Apr 2008 Posts: 5687 Location: Columbus, Ohio, USA, Earth, The Solar System, The Milky Way Galaxy

Posted: Sun Aug 19, 2018 12:11 pm Post subject: Re: FFG ship stat conversion 


Mojomoe wrote:  One of the things I’ve been working on for a while for my own entertainment is a method of converting FFG’s ship stats to D6, mostly because it seemed like the systems were too different and it couldn’t be done. I’ve recently come up with a system of conversion, and I wonder if that’s something anyone would be interested in?
I’d be happy to post it here if so.
It’s certainly different from conversion between D20/SAGA and D6, in that the math behind the conversions isn’t nearly so straightforward. I’ve had to use some pretty complicated equations to plot what on some cases are either exponential, logarithmic, or polynomial coefficients, but I think I’ve got a pretty solid matrix. 
Heya Mojo. I love math and I'd love to see a conversion system for FFG to D6, even if only for ships and vehicles. I'm sure other people would be interested in conversion too. Thanks! _________________ *
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Raven Redstar Rear Admiral
Joined: 10 Mar 2009 Posts: 2156 Location: Pullman, WA

Posted: Sun Aug 19, 2018 1:29 pm Post subject: 


I too, am interested. Always love having more ships to shop for! _________________ RR
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Pel Line Captain
Joined: 10 May 2006 Posts: 984 Location: Texas

Posted: Mon Aug 20, 2018 11:23 am Post subject: 


I'd like to see that also.
Are you focusing on the XWing game or covering the Armada ships too? _________________ Aha! 

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Mojomoe Commander
Joined: 10 Apr 2010 Posts: 442 Location: Seattle, WA

Posted: Mon Aug 20, 2018 2:03 pm Post subject: 


Okey dokey! This is copypasta'd from my Reddit post in the FFG forum, which you can find here. Please take a look and let me know if there are any comments or suggestions on these formulas!
Here's the Reddit thread https://www.reddit.com/r/swrpg/comments/98l7zz/d6_ship_conversions/
Ok, here we go!
To start with, it's important to note four things:
1. This is an approximation designed to cover the *largest number of stats with the most accuracy*. As such, there are some ships that **do not convert correctly**, the primary reasons being a) FFG and WEG do not agree on that ship's capabilities (one or the other has statted it higher or lower than the average for its class), or b) FFG's or WEG's stats are inconsistent with each other. If a ship doesn't convert over 1:1 that's ok  it usually just means FFG thinks of the ship a little differently than WEG does. Still, these formulas have been heavily tested and perform with about 80% accuracy.
2. WEG is a *more granular system* than FFG. This means that when converting from WEG into the much simpler FFG, there is **information lost**. As such, if you were to convert a WEG stat to FFG and back again, you would likely get a different result each time. This is expected with systems of different density.
3. Each system has statistics for things that the other system does not. In many cases, these can be approximated, but are not 100%.
4. I am always looking for help refining these conversion tables!
# Silhouette and Scale
How big is the ship? FFG Silhouette is an abstraction of scale, but there is a clear and mostly consistent silhouettetolength conversion. Because each Silhouette matches to a range of size, for ships which do not have a listed length, simply use the handadjusted estimate for each Silhouette, which matches the majority of ships to within a few meters (or a few dozen, for larger Silhouettes).
 FFG Silhouette  Length  Length Estimate  D6 Scale 

 0  01.5m  1  Starfighter 
 1  1.52.5m  2  Starfighter 
 2  2.57m  5  Starfighter 
 3  720m  12  Starfighter 
 4  2035m  30  Starfighter 
 5  35250m  150  Starfighter 
 6  250600m  300  Capital 
 7  6001,000m  800  Capital 
 8  1,0002,000m  1,500  Capital 
 9  2,00020,000m  10,000  Capital 
 10  20,000+m  20,000  Capital 
# Speed
How fast is the ship? FFG Speed has a pretty clear direct conversion to WEG "Space" rating, although again FFG is a simpler system than WEG so there is data loss in the exchange.
 FFG Speed  D6 Space  D6 Amosphere 

 1  3  260 ; 750 kmh 
 2  4  280 ; 810 kmh 
 2  5  295 ; 850 kmh 
 3  6  330 ; 950 kmh 
 3  7  350 ; 1010 kmh 
 4  8  365 ; 1050 kmh 
 4  9  400 ; 1150 kmh 
 5  10  415 ; 1200 kmh 
 6  11  435 ; 1250 kmh 
 6  12  450 ; 1300 kmh 
# Handling
How maneuverable is the ship? FFGHandling converts pretty cleanly to D6 Maneuverability, although the FFG system does not have a clean ramp. I started with a clean linear progression, but ended up hand tweaking because I was getting values too low on the lower end of the chart.
 Handling  Maneuverability 

 4  0D 
 3  1D 
 2  1D+1 
 1  1D+2 
 1  2D 
 2  2D 
 3  2D 
 3  2D+1 
 3  2D+2 
 3  3D 
 3  3D+1 
 3  3D+2 
 3  4D 
# Crew and Passengers
These convert cleanly across
# Cost
This converts cleanly across, though the two systems tend to disagree on the values for certain ships. In general, WEG's "used" cost is half (0.5x) the "new" cost (FFG is given only in "new" cost)
# Hardpoints
Still working on this one... Seems to be a function of length.
# Encumbrance
How much can this ship carry? FFG's Encumbrance is an abstraction of carrying capacity, which converts pretty cleanly (though not intuitively) to WEG's Cargo Capacity, which measures in mass.
 Silhouette  Cargo Capacity  Example of 5 Encum 

 03  Encumberance x10 kilograms  50 kilograms 
 4+  Encumberance x1 metric tons  5 metric tons 
# Hyperdrive Class and Backup
This converts clean across.
# Armor
How strong is the ship's exterior? FFG's Armor rating converts pretty cleanly to WEG's Hull rating, when grouped by length. Look up the ship's length, find its Armor rating, and the column it's in will tell you its WEG Hull rating. Note that this is the primary determinant of WEG Hull when going from FFG > WEG. Do not use Hull Trauma to calculate Hull, as that conversion is less accurate.
 Length  1D  2D  2D+1  2D+2  3D  4D  5D  6D  7D 

 0  0  1  2  2  3  4  5  6  6 
 20  0  1  2  3  3  4  5  6  6 
 50  0  4  5  5  5  5  6  6  6 
 300  0  5  5  5  6  6  7  7  7 
 600  0  7  8  8  8  9  9  9  10 
# Hull Trauma
How much damage can the ship's exterior take? This can be a little finicky, but the conversions work more often than not. Do not use Hull Trauma to calculate Hull, as it is less accurate. Only use this when going FROM WEG to FFG.
 Length  1D  2D  2D+1  2D+2  3D  3D+1  3D+2  4D  4D+1  4D+2  5D  5D+1  6D  7D 

 0  3  4  5  6  7  8  9  10  10  10  10  11  11  11 
 10  5  6  6  6  15  16  17  18  19  20  20  22  25  28 
 20  15  16  16  17  17  19  20  22  22  22  23  23  25  25 
 50  19  20  25  25  25  25  28  30  32  33  34  34  34  35 
 80  41  42  43  44  45  46  46  52  49  50  55  55  58  60 
 300  68  68  69  69  70  70  71  71  72  72  72  73  73  74 
 900  90  100  104  108  110  114  118  120  124  128  130  135  140  145 
# Defense
This one is the tough part, and took me the longest to crack. How strong are the ship's energy defenses? It's a little tricky because it appears it's different depending on who manufactures the ships, but these charts work as an average.
 Length  0D  1D  2D  2D+1  2D+2  3D  3D+1  3D+2  4D 

 0  0///0  0///1  1///0  1///1  1///1  2///1  2///2  3///2  3///3 
 6.5  0///1  1///0  1///1  1///1  1///1  2///1  2///2  3///2  3///3 
 20  0///1  1///0  1///1  2///1  2///1  2///2  3///2  3///3  3///3 
 50  1/0/0/1  1/1/1/0  1/1/1/1  2/1/1/1  2/1/1/1  2/2/2/1  2/2/2/2  3/2/2/2  3/3/3/3 
 151  2/0/0/1  2/1/1/1  2/1/1/2  2/2/2/1  3/2/2/2  3/3/3/2  3/3/3/3  3/3/3/3  3/4/4/3 
# System Strain
How much pounding can this ship's systems take? While on the surface this might seem like an FFG stat that has no WEG comparison, it actually ends up being a loose correlation to overall length. While there are exceptions, in general these ranges work:
 Length(m)  System Strain 

 7.2  6 
 18  12 
 20  15 
 29  18 
 52  25 
 250  34 
 300  40 
 600  65 
 1200  80 
# Rarity
I'm still working on this one, but my currently guess is it's a rough measure of Length to Cost, as in a factor of PricePerMeter.
# Sensors
How sensitive are the ship's scanners? While WEG has far more levels of granularity (notably the split between Passive, Active, Focus, and Search), FFG's Sensor Range mostly correlates as such:
 Sensor Range  Passive  Scan  Search  Focus 

 Short  10/0D  25/1D  40/2D  2/3D 
 Close  20/0D  40/1D  80/2D  4/2D+2 
 Medium  30/1D  50/1D+2  70/2D+1  3/3D 
 Long  40/1D  75/2D  150/3D  5/4D 
# Weapon Number
In general, for Starfighterscale weapons, the FFG Fire Linked rating is the number of WEG weapons 1.
 2 weapons (firelinked)  3 weapons (firelinked)  4 weapons (firelinked)  5 weapons (firelinked) 

 Firelinked 1  Firelinked 2  Firelinked 3  Firelinked 4 
# Weapon Damage
How much do the ship's weapons hurt? FFG's Damage X; Critical Y correlates pretty cleanly to WEG Weapon Damage, by scale class (Starfighter or Capital)
 Scale  3D  4D  5D  6D  7D  9D 

 Starfighter  Damage 3; Critical 5  Damage 5; Critical 4  Damage 5; Critical 3  Damage 6; Critical 3  Damage 7; Critical 2  Damage 8; Critical 2 
 Capital  Damage 8, Critical 5  Damage 9; Critical 4  Damage 11; Critical 3  Damage 12; Critical 3  Damage 13; Critical 2  Damage 14; Critical 2 
# Weapon Range
How far can the ship's weapons shoot? Again, WEG has more granularity but in general the range bands convert as such:
 Short  Close  Medium  Long 

 1/3/7  13/12/25  110/25/50  315/36/75 
# Fire Control
How much do the weapons assist in aiming? FFG does not have a stat for this, but in general it can be found as a function of its Range
 Range  Fire Control 

 Short  2D 
 Close  3D 
 Medium  3D+2 
 Long  4D 
\
That's it! Please discuss, let me know if I'm missing anything major, and please help me update the formulas if they can be improved. I've tested them with over 120+ FFG stats to WEG, and they hold up pretty well. I'm working on a spreadsheet that does these calcs automatically as well, but that's for down the road. 

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Mojomoe Commander
Joined: 10 Apr 2010 Posts: 442 Location: Seattle, WA

Posted: Mon Aug 20, 2018 2:05 pm Post subject: 


I'll add that the Reddit thread (after some thrashing) managed to post teh tables cleanly and makes for an easier read if you're referencing them! 

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Whill Supreme Chancellor (Owner/Admin)
Joined: 14 Apr 2008 Posts: 5687 Location: Columbus, Ohio, USA, Earth, The Solar System, The Milky Way Galaxy

Posted: Mon Aug 20, 2018 7:34 pm Post subject: 


Thanks, Mojo. It's infuriating to me that a system that is so incredibly more crunchy than D6 is also less granular. I have many FFG books but my eyes just glaze right over the stat blocks and mechanics. For me, the books are strictly for the fluff and art. I would not have the patience to convert, much less divine a conversion system. Cheers to you!
After you've gotten feedback and you tweak or refine anything that needs it, please consider formatting this system into a PDF document. I'd love to host it on the RP Library. _________________ *
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