: good enough : as good as expected or wanted She was checking to see if his work was up to par. —usually used in negative statements His coursework is not up to par.

What does it mean to be on par?

: at the same level or standard as (someone or something else) The new version of the software is on a par with the old one.

Is it on par or at par?

We say a golfer scores "at par", because literally his numerical score is at a certain point, namely the number that is par. "On par" might work to, but it is not as correct to say a number is on another number, but it is correct to say a score is at a number. So at is better for numbers.