Seven Constants, Doing Their Actual Jobs

Every constant below is a fixed number sitting inside a working formula. Pick one, move the single slider, and watch the quantity that constant governs respond — while the ruler above shows where that number sits on a scale spanning 34 powers of ten.

What it computes W = m · g

706.32 N

7.0632e2 N

Constant g

9.81 m/s²

Standard gravity at Earth's surface. Measured, and it varies from place to place.

Held fixed

A single object hanging from a scale on Earth.

Mass m72 kg

1 kg to 200 kg.

Earth g = 9.81 m/s² · Moon 1.62 · Mars 3.72

Tip: weight is a force, so it changes with the planet you stand on while the mass on the slider does not.