Nthuv tuab hais txog qhov sib piv ntawm ib qho khoom muaj ntau rau nws cov ntim. Yog li ntawd, qhov ntom ntawm Aluminium kheej yog nyob ntawm ob qho loj thiab ntim. Raws li cov txheej txheem thoob ntiaj teb ntawm cov chav nyob (SI), qhov ntom ntawm aluminium kheej yog ntsuas hauv ib lub cubic meter (kg / m³) lossis grams ib cubic centimeter (g / cm³imimeter Hauv kev xyaum, qhov ceev ntawm ib qho txhuas kheej yog qhov loj me thiab cov duab, thiab feem ntau nyob ib puag ncig 2.7 g / cm³.
