Neptune is much larger than Earth. It doesn't have a lot of mass for its size though. So, its gravity is just a little greater than Earth's. A person who weighs 100 pounds (45 kg) on Earth's surface would weigh 112 pounds (50 kg) on Neptune. Neptune doesn't have a solid surface. The weight is calculated as if you were standing at the top of Neptune's atmosphere. Move the slider below to compare weights. The slider shows weight in pounds.
