The books I referred to give track measurements separately for westerns, easterns, and wolves. Obviously there is overlap, but it would be interesting to know the range of track sizes those coyotes made, if you think they are very large. Are they in the wolf range? Coyotes in the northeast are amongst the biggest, and I believe New York has the largest.
As you may know, eastern coyotes have been shown to have DNA of both wolf and western coyote, and are intermediate in size and in degree of sociality between wolf and western coyote. Most are more like western coyotes than like wolves (and genetically over 90% western coyote), but some are very large and more wolf-like. A coyote biologist (Jonathan Way) here in Massachusetts collared a 70+ lb female coyote, though most are less than 50 lbs. He has a website, you can google if you want, but I think average weights of animals he has collared have been in the 30s and 40s.
No, you cannot calculate an exact weight from track measurements, but bigger tracks usually do mean bigger animal, and as a tracker, I find it fascinating to follow track sizes of different species over the years. Things like human land use patterns, hunting, trapping, and climate change all impact these animals. They have to adapt or evolve to cope with what we do to them, if they are to survive. Evolving to a somewhat more wolf-like creature is what coyotes of the east have done to meet these challenges.