According to one study, vegans consume 600 fewer calories per day than meat eaters. If we divide 35,000 calories by 600 calories per day, we can find that it could take a vegan roughly 58 days (two months) to shed 10 pounds.
On a vegan diet, you may lose 63 pounds in a year at that same average calorie-burning rate (if you have that much excess fat to lose). However, that is not a guarantee. It differs in practice. According to another study, overweight persons who followed a vegan diet for six months lost an average of 7.5% of their body weight. (If you weigh 200 pounds, you will lose 15 pounds in 6 months.)
However, only some people lose weight after going vegan, as it varies on one’s lifestyle.
While we cannot give an exact answer to this because it still depends on your lifestyle-workouts, diet, etc., some studies state that moving to a whole-food, plant-based diet results in an average weight loss of one pound per week.
You can start by eliminating meat or dairy one day per week and work your way up from there. You can also try altering one meal at a time, such as having vegan breakfasts the first week and Increasing your intake of whole grains, beans, lentils, tofu, nuts, and seeds. You can do it all at once, one food group at a time, or as slowly as you need to.