Unit Weight Working Time Length / Distance Surface Volume Units reference Dozens bigger Days reference Hours smaller m reference mm smaller km bigger cm smaller m² reference L 1.0 reference m³ 1000 bigger kg reference g smaller t bigger lb 2.20462 smaller oz 35.274 smaller in 39.3701 smaller ft 3.28084 smaller yd 1.09361 smaller mi bigger ft² 10.76391 smaller fl oz (US) 33.814 smaller qt (US) 1.05669 smaller gal (US) bigger in³ 61.0237 smaller ft³ 28.3168 bigger