| 31.3 mg * | 0.001 g | = 0.0313 g | 
| 1 mg | 
| Eenhede van meting | Gewig | 
|---|---|
| Mikrogram | 31300.0 µg | 
| Milligram | 31.3 mg | 
| Gram | 0.0313 g | 
| ons | 0.001104075 oz | 
| Pond | 6.90047e-05 lbs | 
| Kilogram | 3.13e-05 kg | 
| Stone | 4.9289e-06 st | 
| Amerikaanse ton | 3.45e-08 ton | 
| Ton | 3.13e-08 t | 
| Imperial ton | 3.08e-08 Long tons | 
