=INT(A1)+IF(MOD(A1,1)<0.4,0,IF(MOD(A1,1)<0.7,0.5,1 ))

--
HTH

Bob Phillips

(replace somewhere in email address with gmail if mailing direct)

<Stuart Carnachan wrote in message
...
I have a calculation of an average of 4 & 7 nos. I want to round down any
thing between .1 & .3 e.g. 3.3 = 3.0

roundup/down to .5 if between .4 & .6 e.g 3.4 = 3.5 & 3.6 =3.5

and round up between .7 and .9 eg 3.7 to 4.0
and if a whole no leave alone e.g 3.0 = 3.0

--
Stuart