If you walk 25 minutes 4 times per week how much weight can you lose?

How much weight you might lose depends on your current weight, your degree of fitness, your body composition, and where you are walking (flat ground or incline) as well as how far you are walking and how fast you are walking. Walking to lose weight is mild cardio exercise and very effective for weight loss when done correctly. Unlike running, it is easier on your body and it is sustainable long term. To learn how to do it correctly, see the page link, further down this page listed under Related Question.