Set a mass, then hop between worlds. The same person keeps the same mass everywhere, but the scale reading leaps because weight is W = m × g — and every world pulls with a different g.
Weight W = m × g
686.7 N
on Earth
Scale reading m·g ÷ 9.8170.0 kg
Compared to Earth g ÷ 9.811.00×
Planet preset
Gravity g9.81 m/s²
Mass m70 kg
Watch the mass stay fixed while the scale reading changes: your mass is the same on every world, only your weight moves. A bigger planet doesn't always win — set g by hand to compare.