# How much does the Earth weigh?

Have you ever wondered, just how much does the Earth weigh? Astronomers have worked to answer this question, but you need to know the difference between weight and mass first in order to understand how scientists answer this question.

Mass measures how much matter makes up an object. On the other hand, weight measures how much gravity pulls down on the object. Mass stays the same no matter where it is, which means your mass is the same on Earth as it is anywhere else in space. However, since weight measures gravity’s pull, your weight on Earth will be different than other places in space. Since the moon has less gravity, you would weight significantly less on the moon. Knowing the difference between mass and weight is important when trying to answer and understand the question regarding the Earth’s weight.

Therefore, when you are asking how much the Earth weighs, you are asking how many pounds or kilograms it would read if you placed it on a scale on Earth’s surface. Since Earth is floating in space, and it is huge, we cannot place it on a scale. Scientists have gotten around this problem by using math and knowledge of gravity and physics to calculate how much Earth would weigh.

Scientists say that Earth weighs around 6 x 1024  kilograms, or 1.3 x 1025 pounds. The actual size may be just slightly over this.