I recently got into an argument over how big a cup is. I’d thought that measurement came in only two sizes, Imperial and Metric, so I hit up Wikipedia.
| 1 U.S. legal cup | 240mL |
| 1 U.S. customary cup | 236.5882365mL |
| 1 Metric cup | 250mL |
| 1 Imperial cup | 284mL |
| 1 Canadian customary cup | 227.3045mL |
| 1 cup in some Latin American countries | 200mL |
| 1 contemporary Japanese cup | 200mL |
| 1 historic Japanese cup | 180.3906836mL |
… This is why we cannot have nice things.