Hi, Parkrun has calculated my age grade differently than GRG for a race. There's roughly a 1% difference between them. Which calculation should I use on this site? I'm not really concerned about which is the more accurate. I'm more intrested in which one you'd prefer to perform this site's table calcultions.

Thanks in advance.

No worries - just noticed in the rules tab that calculations must be from this site - should have looked there first :)