The Planck length ℓ P is defined as: ℓ P = ℏ G c 3 ≈ 1.616 255 ( 18 ) × 10 − 35 m , where is the speed of light, G is the gravitational constant, and ħ is the reduced Planck constant.

I know they’re not the same. But they obviously depend on each other, no?

> But they obviously depend on each other, no?

Sure, but so does twice the Planck length. Also half the Planck length. Also 86.173491 times the Planck length. And so on.