Can anyone tell me how many calories this person should be eating per day?

[bobsnotabuilder]

6ft tall male.

Very athletic and does intense training - swimming, running, gym daily, often twice a day.

He doesn't want to build muscle but have a lean athletic physique.

Any nutritionists or the suchlike have any ideas (roughly)?

scoobysworkshop.com/calorie-calculator/

There are others. You will need to know his weight and age as well.

scoobysworkshop.com/calorie-calculator/

Go on www.nutracheck.co.uk and put in all the details such as his weight, age, activity levels and it will tell you.

It will be different for the individual, as rates of metabolism differ genetically.

I have always had a high rate of metabolism and when a ballet student I ate far more and was always hungry than others who were heavier than I was .
Unfortunately there is no test for individual rates of metabolism, so any information is only a guide not an absolute.