Calculating RTP…

Is there an easy way to calculate rtp?

Any calculator on the website?

I know 100% is 10k pace ? So for me around 13secs or more per mile quicker than threshold.

So let’s say 10k pace is Y secs per mile and Zis rtp.

Is the formulae {Y / Z} \ 100 then * 60

60 to convert back to secs per mile. There must be an easy way and I’m surprised it’s not on the website