| 31 mm * | 0.0393700787 in | = 1.2204724409 in | 
| 1 mm | 
| Måleenhed | Længde | 
|---|---|
| Nanometer | 31000000.0 nm | 
| Mikrometer | 31000.0 µm | 
| Nillimeter | 31.0 mm | 
| Centimeter | 3.1 cm | 
| Tomme | 1.2204724409 in | 
| Fod | 0.1017060367 ft | 
| Yard | 0.0339020122 yd | 
| Meter | 0.031 m | 
| Kilometer | 3.1e-05 km | 
| Nil | 1.92625e-05 mi | 
| Sømil | 1.67387e-05 nmi | 
