Depending on your age weight and height but at about normal for a child under age 15 2 maybe 2 1/2 weeks before you die. Under that 1 1/2 2 if you are lucky before death . And the average adult (over 18) 3 to 3 1/2 weeks. This is only accurate if you are supplied with enough water. And remember for the average adult the three threes 1. 3 minutes with no air, 2. 3 days with no water, 3. lastly 3 weeks without food.