| 521 mg * | 0.001 g | = 0.521 g | 
| 1 mg | 
| Fyzikálna jednotka | Hmotnosť | 
|---|---|
| Mikrogram | 521000.0 µg | 
| Miligram | 521.0 mg | 
| Gram | 0.521 g | 
| Unca | 0.0183777342 oz | 
| Libra | 0.0011486084 lbs | 
| Kilogram | 0.000521 kg | 
| Stone | 8.20435e-05 st | 
| Short Ton | 5.743e-07 ton | 
| Tona | 5.21e-07 t | 
| Long Ton | 5.128e-07 Long tons | 
