Daily Calorie Calculator- this is actually a pretty decent one. Also remember to subtract for losing weight regardless of activity level. Remember that adding those percentages is for everything to work as it should and maintain, not lose weight.
Sheppard A Simple Way to Calculate Macros and Calories for Your Goals. This is the simplest version I have found and matches almost exactly the macros off IIFYM (much more complicated formula I used) check it out