Source's Units to Standardized Units?

Alright, this might seem a bit dumb, but I need a list, a link, a table, something; anything that can tell me what source’s units are when standardized (e.g. grams, mph, pounds, etc.)

1 unit = 1 inch
Mass is in kg.

[lua]
local INCHES_TO_METRE = 39.3700787;

– A function to convert Source units to metres.
function unitsToMetres(units)
return units / INCHES_TO_METRE;
end;

– A function to convert Source units to centimetres.
function unitsToCentimetres(units)
return unitsToMetres(units) * 100;
end;
[/lua]

Thanks for the support.