Neptune, as a planet, doesn't have weight because weight depends on the gravitational field which varies by location. However, it has mass which is constant and equals approximately 1.024 × 10^26 kg. In weight, this would translate to approximately 1.14 x 10^28 pounds when considering Earth's gravity. However, this weight has no meaningful context outside an environment with gravity, like Earth. Neptune's mass is a more reliable and significant measure.