
Alliance Units of Measurement
20090319
This page defines the most common measurement units in use in the Alliance. Where there are equivalents in our system, they will be included. Rounding will be done to the fifth significant decimal place when exact figures cannot be calculated. The letter "m" in any table refers to meters.
Distance computations are based on the speed of light = 299,792,458 meters/second, in SI meters.
Unit Multiplier Prefixes 
Positive Exp  Value  Negative Exp  Value 
La  10^1  Li  10^1 
Ka  10^2  Ki  10^2 
Va  10^3  Vi  10^3 
Sa  10^6  Si  10^6 
Na  10^9  Ni  10^9 
Da  10^12  Di  10^12 
Ba  10^15  Bi  10^15 
Pa  10^18  Pi  10^18 
Ha  10^21  Hi  10^21 
Ma  10^24  Mi  10^24 
Units of Time Measurement 
Unit of time  Value of unit 
Rhek (reck)  43.19583144 seconds exact 
Karhek (kahreck)  100 rhek = 71.9930524 minutes exact 
Galun (gahlun)  1 Kakrek (GALactic UNit, for use in English) 
Redaar (redahr)  20 Karheks = 23.9976841333... hours = 1 Galactic Day 
Cendrol (sendroll)  100 Redaars 
Ardrol (ahrdroll)  500 Redaars or 5 Cendrols = 1 Galactic Year 
Mildrol (milldroll)  100 Cendrols or 20 Ardrols 
Drolen (drollen)  1000 Cendrols or 200 Ardrols 
Note: the above units are the Alliance standard values. Individual planets have their own time systems based on their day length. For example, Korendor's "local" time is based on the day length of 24h 19m 31.0632s. When referring to the planetary timekeeping system, if the same terms are used, they are given a suffix to differentiate them from the standards.
Units of Length, Area and Volume 
Unit of measure  3dimensional  4dimensional 
Length  Thali (thahlee)  Thalikarta 
Area  Thalu (thahloo)  Thalukarta 
Volume  Thalo (thaloh)  Thalokarta 
Thali = Wavelength of a frequency of 1 savibar
Thali = 12.94978 meters = 42.48604 feet
Thalu = 167.69692 meters˛ = 1805.06359 feet˛
Thalo = 2171.63896 metersł = 76,690.00409 feetł
Note: 4D computations are far beyond the scope of this page. The units are mentioned only for reference purposes. 
Units of Speed 
Unit  Definition 
Thalir (thahleer)  Thali per kirhek = 29.97924 m/s = 98.35681 f/s 
Kithalir (keythahleer)  Kithali per kirhek = 0.29979 m/s = 0.98357 f/s 
Units of Acceleration 
Unit  Definition 
Thalari (thatlahree)  Thali/kirhek/kirhek = 29.97924 m/s/s = 98.35681 f/s/s 
Thaliri (thahleeree)  Kithali/kirhek/kirhek = 0.29979 m/s/s = 0.98357 f/s/s 
Unit of Mass 
Unit  Definition 
Lara (lahrah)  Lara = Mass of 1 nithalo of pure water at 462.8424 saden (39.2°F or 4°C) = 2.17164 grams 
Units of Force 
Unit  Definition 
Exora (eksorah)  Force to accelerate 1 lara of mass at 1 Thaliri
= 65.10412 dynes 
Saexora (sahteksorah  One million exora or 146.35988 pounds of force (lbf) (pronounced with the 't' to avoid double vowel) 
Units of Pressure 
Unit  Definition 
Thalex (thahlex)  1 Saexora of force on an area of 1 Lithalu
= 1.23330 psf = 0.0085646 psi 
Vathalex (vahthahlex)  1000 Thalex = 1233.30 psf = 8.5646 psi (common use) 
Unit of Circular Measure 
Unit  Definition 
Vaeri (vayree)  1/1000 of a circle = 0.36 degree 
Unit of Temperature 
Unit  Definition 
Saden (sahden)  1 Saden = 0.5988 °C; 1°C = 1.67 Saden 
Temperate is measured beginning at 0 saden = absolute zero. It increases at a rate based on the thermal expansion of the element Copper. It is the increase in temperature that results in a coefficient of expansion of 10.0 ppm in pure copper at about 27°C.
The Terran value for copper = 16.7 ppm per degree C at about 20°C, from this page.
In comparison to the Kelvin scale, 1 Saden = 0.5988°K. The freezing point of pure water at Earth sea level is 0°C or 273.15°K. This would be 456.1605 Saden. 
Unit of Heat Quantity 
Unit  Definition 
Sadenol (sahdenawl)  Heat required to raise 1 lara of pure water 1 saden 1 Sadenol = 1.60144 calories = 0.006355 BTU 
Units of Electrical Measurement 
Measured parameter  Unit  Value 
Electrical charge  Talom (tahlom)  Equiv to coulomb 
Voltage  Dani (dahnee)  Equiv to volt 
Current  Secri (sehcree)  Equiv to amp 
Resistance  Laten (lahten)  Equiv to ohm 
Power  Vittyr (viteer)  1 Dani x 1 Secri 
Capacitance  Lexa (lexah)  Equiv to farad 
Inductance  Athu (ahthoo)  Equiv to henry 
Conductance  Renn (ren)  Equiv to siemens 
Impedance  Laton (layton)  Equiv to ohm 
Reactance (cap)  Klaten (clayten)  Equiv to ohm 
Reactance (ind)  Illaten (illayten)  Equiv to ohm 
Frequency  Vibar (veebar)  Cycles/virhek = 0.0432 hertz 
Amplification  Sarren (sahwren)  1 sarren = unity gain 
Sensitivity  Tran  Detection of 1 sidani signal 
© 2008 Robert P. Renaud  all rights reserved

