Uploaded March 2026 | Updated September 2026, 2 weeks ago
Ever wonder why you might weigh slightly less at the equator than at the North Pole—even on the exact same bathroom scale?
In this video, we break down the fascinating physics behind it. We explore two key effects: the centrifugal force from Earth’s rotation, which can reduce your apparent weight by up to 0.3% at the equator, and the fact that Earth is an oblate spheroid—flattened at the poles and bulging at the equator—meaning you’re actually a little farther from the center of the planet when standing on the equator, weakening gravity ever so slightly.
We also look at how altitude, local geology, and even the gravitational pull of the Moon play smaller roles. By the end, you’ll know exactly why stepping on a scale at the North Pole versus the equator can make you “heavier” or “lighter,” and just how much of a difference it really makes.
Ever wonder why you might weigh slightly less at the equator than at the North Pole—even on the exact same bathroom scale?
In this video, we break down the fascinating physics behind it. We explore two key effects: the centrifugal force from Earth’s rotation, which can reduce your apparent weight by up to 0.3% at the equator, and the fact that Earth is an oblate spheroid—flattened at the poles and bulging at the equator—meaning you’re actually a little farther from the center of the planet when standing on the equator, weakening gravity ever so slightly.
We also look at how altitude, local geology, and even the gravitational pull of the Moon play smaller roles. By the end, you’ll know exactly why stepping on a scale at the North Pole versus the equator can make you “heavier” or “lighter,” and just how much of a difference it really makes.
