Marshall and I proposed the following set of 'natural units' and symbols for our Forum.

The starting premise is that , and are good natural units, meaningful proportions that are built into nature. This is like the garden gate through which one enters.

is the limiting speed

is the inherent limit on exactness

is the force expressing the stiffness of geometry. It governs how geometry interacts with matter, because the GR equation basically says:

curvature = , where is matter density.

Curvature is a reciprocal area ("per sq. foot") quantity, and if you multiply force by curvature you get quantities such as pressure and density, describing the concentration of matter. The GR equation's tells, among other things, the concentration of matter that would be needed to produce a given curvature in the geometry---it hitches up the two things. These three: , , , are woven into existence at a basic level, so we take them as natural units.

Moving on, we show the path to the other natural units, and each one should be Google-calculable so we can get the automatic metric equivalent whenever we want. Simply paste the right-most part of each equation into Google, press enter or search, and you should get an answer in normal metric units.

Force: = c^4/(8pi G)

Area: = hbar*8pi G/c^3

Length: = (hbar*8pi G/c^3)^.5

Time: = (hbar*8pi G/c^5)^.5

Energy: = (hbar*c^5/(8pi G))^.5

Momentum: = (hbar*c^3/(8pi G))^.5

Mass: = (hbar*c/(8pi G))^.5

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