Roman obolus = 0.0005682864407 kilogram
Try converting from "Roman obolus" to bes (Roman bes), bowling ball, crith, dram (avoirdupois dram), earth mass, gram, kwan (Japanese kwan), livre (French livre), Mexican libra, mina (Greek mina), neutron mass (neutron rest mass), oz ap (apothecary ounce), pennyweight troy (troy pennyweight), pfund (German pfund), pound ap (apothecary pound), proton mass (proton rest mass), short quarter, UK quintal (British quintal), uncia (Roman uncia), wey mass, or any combination of units which equate to "mass" and represent mass.
Roman obolus = 3.42E+23 AMU (atomic mass unit), .00174008 as (Roman as), .00000251 cotton bale (US), .00000167 cotton bale Egypt, .14616667 denarius (Roman denarius), .13239672 drachma2 (Greek drachma), .14616667 dram troy (troy dram), 8.77 grain (avoirdupois grain), .040304 Israeli shekel mass, .00015149 kwan (Japanese kwan), .00115977 livre (French livre), 5.68E-07 metric ton, 175.4 mite (English mite), 3.39E+23 neutron mass (neutron rest mass), .0000347 pood (Russian pood), .00125286 pound, .00152257 pound ap (apothecary pound), .50028523 scrupulum (Roman scrupulum), .00008949 stone, .00001119 UK quintal2 (British quintal).
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