bpm / semitone shift calculator

i made a little xcel based calculator for either finding a new tempo based on change of tune, or finding tune change required to fit a new tempo... i find it faster than tweaking the tempo by ear - and figured others may find it useful.

red values are the ones intended to be entered by the user - the black ones are the results..

https://www.box.com/s/iko81foqhga3s4pjj91f

ps - yes i am a mega spreadsheet nerd. Alan johnson is my hero.

http://mp3.deepsound.net/eng/samples_calculs.php

i use this a lot too.......

that second one is mad useful, something i need to learn more about is the relationship between bpm and pitch.......rather than always just doing it by ear!!