The latter does not occur with Planck units.

Particle physics predicts a natural value of 1 in reduced Planck units, leading to a large discrepancy.

It is usually represented within a particular energy or length scale, such as Planck units.

This makes Planck units particularly useful and common in theories of quantum gravity, including string theory.

Table 3 offers a sample of derived Planck units, some of which in fact are seldom used.

Table 2 clearly defines Planck units in terms of the fundamental constants.

In fact, 1 Planck unit is often the largest or smallest value of a physical quantity that makes sense according to our current understanding.

The Planck units are based on the quantum of action, now usually known as Planck's constant.

When Planck units are used to express any of these five physical constants, the value is 1.

Planck units are only one system of natural units among other systems.