How to calculate cfm to tr?

Cooling BTU’s = 4.5 X CFM X Change in enthalpy

you can get enthalpy change from initial and final condition of air by psychometric chart.

Normally DX system gives 400 CFM / Ton but under certain conditions mentioned in their catalouge.

1TR = 400 CFM Delta T in F X Flow in USGPM / 24 

the next formula has been taken from carrier catalog it may change from brand to other

Tidb = inlet dry bulb F

Tedb = exit dry bulb F

as a rule of thumb

for circulating supply and return units 300 :400 cfm per ton

For total fresh air units 150: 200 cfm per ton

1 TR= 400 CFMEX. 10000CFM/400= 25 TR