User blog comment:Kaido King of the Beasts/Chapter 799: A Situation of Much Gravity/@comment-8334485-20150903195744/@comment-24.235.56.170-20150905054406

I hope you don't mean Whitebeard's strength at Marineford. The New World pirates that allied themselves with WB for that weren't necessarily under a permanent alliance with him or under a subordinate situation like Luffy's new fleet. My understanding is that WB rallied all the support he could muster for one all-out assault, meaning that many of the crews that joined him may only have been loosely affiliated with the actual WB fleet. In other words, it wasn't just the guys that would follow him anyway, he probably also called in whatever favours he was owed to bolster his ranks.

Taken directly from the WB pirates page:

There were 16 division commanders and Whitebeard himself in his crew, each division commander commanding 100 men. There was a grand total of 1,617 men in Whitebeard's crew.

S o normal is probably more than that but less than what he had at Marineford.