Question: how long does it take a lobster to grow 1 pound?
Answer: It takes lobsters an average of 5 to 7 years (depending on the water temperature) to grow to legal size, and they grow more slowly as they get larger. Therefore a lobster that weighs 3 pounds is an estimated 15-20 years old, and a 25 pound lobster would be approximately 75-100 years old.