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The tick, the base unit of time, is defined in the same way as the second: the unperturbed ground-state hyperfine transition of Cs-133 is equal to 16^8 tak (tk) (where 1 tak is t^-1 or 1/t). This means that 1 t ≈ 0.4672184640 s.

The span, the base unit of length, is defined such that the speed of light in a vacuum, c, is 16^7 sp/t exactly, making 1 sp ≈ 0.5217960915 m. The grav, the base unit of mass, is defined such that the Planck constant h = 16^-25 gv⋅sp^2/t, making 1 gv ≈ 1.441364926 g.

The therm, the base unit of termperature, is defined such that the Boltzmann constant k = 16^-17 gv⋅sp^2 / t^2⋅th, making 1 th ≈ 2.266665264 K. The une, the base unit of electric current, is defined such that the elementary charge e = 16^-15 kf (1 kifi = U⋅t), making 1 U ≈ 0.3953576405 A.