Hi,
have you seen this topic?
You need your daily TDEE (any calculator is ok) and the workouts estimate kj. Take these as kcal and add them to your TDEE. This is the startline. From here on you have to be consistent and see If your weight drops if you eat at a deficite of 500-1000 kcal. Therefore you have to track your meals (My Fitness Pal e.g.).
If you dont want to loose muscle/strength you should take a closer look on your protein intake. Everybody has a different opinion. But if you aim for at least 1g Protein/kg weight up to max 2g Protein/kg (very high) you should support your body in a good way.
Thats the short answer.
Best regards!