Startup includes the first active frame, right? ... See this is why I like standards... THE US SHOULD USE THE METRIC SYSTEM! Now that I got that off my chest... I used a KoF XIII - yes, I like KoF very much - frame data spread sheet for reference and it specified startup as having the first active frame. Before that, I used hit frame(s) from BJN39's Zelda frame data which I still do for simplified stuff so to show stuff like the hit frames of jab is 2-4 or jab hits on frame 2-4.
I think the Shoryuken wiki... thing... has startup without the first active frame. I could argue for either, but having startup include the first active frame is simple. A move with 5 frames of startup is not active until the 5th frame and there you go, 5 frames of startup. OR, you could argue that a move with 4 frames of startup is not active until the 5th frame as it takes 4 frames before the move is active. "s" could also just be "start frame"...
Then there's the whole total frames, IASA, and FAF. I think only Smash uses IASA and FAF. Traditional fighting games just use total frames and assume you know that the next frame is when you act which make sense. So, saying something makes you commit to 30 frames means you commit to 30 frames before you can act on the 31st frame.
As for weight, I just wanted an average which Mario is kind of not unless you sum Bowser and Jigglypuff's and divide them. If you sum the entire roster and consider the Mii Fighters are 3 separate characters, it's Palutena and Duck Hunt's at 91, but if you don't it's Robin, Roy, Sonic, and Pac-Man at 95. Marth's is fine since he's at 90, but using Falco's would skew stuff since his weight is 82. If I did Fox's hit stun and stuff, I probably wouldn't have used Fox's weight of 79. Still, it's Mario and he's been deemed the punching bag since 64.
For calculator stuff, well, I could always use the search function and I could always lurk the Marth and Lucina boards since they're usually on-point with frame data stuff. Zelda boards too, but BJN39 hasn't done hit stun and frame advantages to my knowledge.