Wiktionary
average up
vb. (context idiomatic transitive English) to calculate an average or rough figure.
Usage examples of "average up".
As far as he was concerned, he was justifiably proud of them, even if they were on the low side of average up-time.
Six kid, ages ranging from about fourteen to the baby, who looked to be about six months old, and all the kids toed the line far, far better than the average up-time child.
It was not until July, though, that he brought his average up to .