Measurement Units
Overview
Global decimal system based on the selm (≈1 meter), letrum (≈1 liter) and mar (≈1 kilogram).
Uses familiar prefixes (milli-, centi-, kilo-) for scaled notation. Extended with additional units for astronomical distances.
Length
- milliselm (msl) = 0.001 selm
- centiselm (csl) = 0.01 selm
- selm (sl) ≈ 1 meter
- kiloselm (ksl) = 1,000 selm ≈ 1 kilometer
Usage: building and corridor dimensions in selm/centiselm, ground distances and flight altitudes in kiloselm.
Area
- square selm (sl²): for plots, rooms and façades
- kiloselm²: for large areas and mapping
Volume
- letrum (Ltr) = (0.1 selm)³ = 0.001 selm³ ≈ 1 liter
- milliletrum (mLtr) = 0.001 letrum
- centiletrum (cLtr) = 0.01 letrum
- kiloletrum (kLtr) = 1,000 letrum
Usage: liquids, food, fuel, and laboratory reagents
Mass ("Weights")
- mar (mr) = mass of 1 letrum of pure water under standard conditions ≈ 1 kilogram
- millimar (mmr) = 0.001 mar
- centimar (cmr) = 0.01 mar
- kilomar (kmr) = 1,000 mar
Usage: commercial weights, portions, cargo lists, and equipment specifications
Astronomical Distances
- stell = 1,000,000 kiloselm = 10⁹ selm
- kilostell = 1,000 stell
Usage: interplanetary and interstellar distances, usually combined with travel time (e.g., "two days by blink drive").