If you are wondering how many cardboard boxes you will need, it does not come as a surprise. Not many people know the exact number of boxes they will need. The number of boxes depends on the number of belongings and their types. Generally, for a house of up to 700 square feet, you will need 10 boxes of medium or small size and 7 boxes of large size. Further, if your house is large, you will need around 20 to 50 boxes of different sizes.