Measurement converter

Try converting from "mg" to arroba (Mexican arroba), as (Roman as), assay ton, bag, bowling ball, catty (Chinese catty), cotton bale Egypt, denarius (Roman denarius), dram (avoirdupois dram), Greek obolos, long quarter, mite (English mite), pennyweight troy (troy pennyweight), pfund (German pfund), proton mass (proton rest mass), scrupulum (Roman scrupulum), slug, Spanish libra, stone, tael (Chinese tael), or any combination of units which equate to "mass" and represent mass.

mg = .00000306 as (Roman as), .00003429 assay ton, .00000459 bes (Roman bes), 4.41E-09 cotton bale (US), 2.94E-09 cotton bale Egypt, .01103753 crith, 1.00E-08 doppelzentner, .00487805 English carat, .00007092 Israeli shekel mass, .00000167 kin (Japanese kin), .00000217 Mexican libra, .00000233 mina (Greek mina), .00003215 oz troy (troy ounce), .00000268 pound troy (troy pound), .00077162 scruple (apothecary scruple), 2.20E-08 short hundredweight (avoirdupois short hundredweight), .00000217 Spanish libra, 2.20E-08 UK quintal (British quintal), 1.97E-08 UK quintal2 (British quintal), 8.75E-09 wey mass.