[header] How to lose 6 kgs in 30 days [title] Count your calories. [step] In order to lose weight you'll need to cut down on the total amount of calories you eat each day. [substeps] Cut out between 500-750 calories each day. 
This will help you lose anywhere from 0.5-1.0 kg (1-2 pounds) per week. In combination with exercise you may be able to lose 1.3 kg (3 pounds) per week; however, this not a guarantee.