# Eli5, If I weigh 100 kilograms on the surface of the earth. How much would I weigh if I dug a hole half way to the center of earth. Also how much would I weigh if I dug a hole half way through and stood in the center of the earth?

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Eli5, If I weigh 100 kilograms on the surface of the earth. How much would I weigh if I dug a hole half way to the center of earth. Also how much would I weigh if I dug a hole half way through and stood in the center of the earth?

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Under ideal conditions, half way to the core you would weigh half as much as on the surface and in the center of the earth you would weigh nothing.

[This answer](https://www.scienceforums.net/topic/68251-dig-a-hole-halfway-to-the-center-on-the-earth-what-would-you-weigh/?do=findComment&comment=696289) suggests you’d weigh 60% halfway. At the core, weight is 0. Mass remains the same theoretically, although by the time you get to the core, you’ll be dead.

The exact details depend slightly on where on Earth you are, because the Earth isn’t perfectly symmetric. But, on average, [your weight would increase slightly down to the edge of Earth’s core, then would drop quickly to zero at the center of the Earth](https://en.wikipedia.org/wiki/Gravity_of_Earth#/media/File:EarthGravityPREM.svg). Halfway to the center, you would weigh very slightly more than you do on the surface – something on the order of 105 kg.

[As an aside, kg are strictly speaking a unit of *mass*, not weight, and your *mass* would not change. But I’m going to assume by 100 kg you mean “weigh the force that a mass of 100 kg has in Earth’s standard gravity”.]

Sorry, if you’re using kilograms, you’re talking mass, not weight, which is a force.

Just one of the downfalls of metric – a weight bearing device rated for pounds will be safe to use anywhere – earth, the moon, or Mars. A scale will show the force.

If you have a device rated for 200 kilograms, that’s only under earth’s gravity. You’ll need to use a spring based scale that can tell you how much your item “weighs”.