Munurin millum rættingarnar hjá "Millumtjóða eindarskipanin"
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|'''1956'''||{{sfrac|31556925,9747}} av tropiska árinum 1900.
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|'''1967'''||Tíðin fyri 9 192 631 770 periodum av strálingini frá <sup>133</sup>[[
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|style="background:#F5F5F5" rowspan=3|'''[[ampere]]'''
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! Síðani
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|style="text-align:center"|Δ''ν''<sub>Cs</sub>||Geislingarfrekvensur frá <sup>133</sup>[[sesium|Cs]]-atomi||style="text-align:center"| 9 192 631 770 Hz||style="text-align:center"| 1967
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|style="text-align:center"|''c''<sub>0</sub>||Ljósferðin í tóma rúminum||style="text-align:center"|299 792 458 m/s||style= "text-align:center"| 1983
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|style="text-align:center"|''N''<sub>A</sub>||Avogadros konstantur||style="text-align:center"|6,022 140 76 × 10<sup>23</sup> mol<sup>−1</sup>||style="text-align:center"|2019
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|style="text-align:center"|''K''<sub>cd</sub>||Fotometriskur konstantur við 540 THz||style="text-align:center"|683 lm/W||style="text-align:center"| 1979
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