I intend to use the WAVA headings as an incentive for my dad when I manage to cajole him back into running again. He's 66 now and he used to run a 3:15 marathon. I'm not sure what the 66 year old equivalent is of his 35-ish year old time, but I'll be finding out!
It's easily done. Stick 35yrs/3:15 in the calculator that Seren linked to above and it gives you a WAVA score of 63.6. Plug that back in for a 66yo and it gives you 4:14.
Obviously being a "Vet" I'm paying more attention to WAVA numbers all the time
, but you need to remember that they're based on world best performances at different ages, and tend to get a little softer the higher you go, because older athletes aren't going to be full-time like their younger, elite, sponsored counterparts, and there are simply fewer people at the older end competing. Still a useful incentive to keep going though.