First of all, losing weight depends not only on the kilometers you walk every day, but also on your diet, lifestyle, physical condition and many other factors. Secondly, even if we know the kilometers you walk every day, we can't accurately predict whether you can lose weight, because everyone's physical condition and metabolic rate are different. The best way is to seek the advice of professional nutritionists and fitness coaches, and customize the diet and exercise plan that suits you according to your specific situation.