Your typical “Public” or “Default” league setting is nearly identical across fantasy football. That is, the “standard” scoring system in fantasy football is accepted across all sites. So what is this scoring system?
For your quarterbacks, running backs, wide receivers and tight ends:

25 passing yards per point.
4 points per passing TD.
10 rushing/receiving yards per point.
6 points per rushing/receiving yard.
-1 point for an interception.
-2 points for a fumble recovered by the other team.
2 points for catching/throwing/running for a two point conversion.
For kickers:
Field Goal from 1-39 yards; 3 points.
Field Goal from 40-49 yards: 4 points.
Field Goal from 50+ yards: 5 points.
Point After Touchdown (PAT): 1 point.
For Defenses:
1 point per sack.
2 points per turnover.
2 points per safety.
2 points per blocked kick/punt.
6 points per TD off a turnover.
??? points for ??? points allowed.
You’ll note the question marks above…well, that’s for “points allowed” by a defense. The basic gist is that there will be ranges of points (usually 0, 1-6, 7-13, 14-20, 21-27, 28+) and you will get some number of points for that value. Depending on what site the league is on, you’ll be able to shift where the cut-offs are for fantasy points are, as well as how many points you get. This makes a difference in the overall value of defenses…but not a huge difference in the tiers for defenses. Usually, though, you’ll get somewhere between ten and fifteen for a shutout, then seven and eleven for keeping a team under seven and so on.
You may also be wondering where the elusive kickoff/punt return TD is…well, you’ll have to look in the Alternative Scoring section for info on that. Keep in mind that very, very many leagues have altered scoring systems. So…seriously…check out that Alternative Scoring section.
