How much do you have to walk a day to lose weight?

If a person was to commit to walking 4,500 extra steps per day, or roughly 3 extra miles, they would be burning an extra 300 calories a day (at least). Burning 300 calories each day leads to a weekly deficit of 2100 calories. After a month, that’s roughly 9000 cal burned, which equates to approximately 2.6 pounds lost.