Finish formula

My computer screwed up and I lost my link to the "Finnish formula" utility. If any of you out there know what I am talking about, can you let me know what the web address is? This has to do with a discussion in yesteryear regarding "comparable times" over ones lifespan--i.e., a 49 at age 20 for the 100 free is equivalent to what time at age 60? Thanks, Jim