Qhov hnyav ntawm cov pwm tuaj yeem suav los ntawm cov hauv qab no:
Cov khoom siv tiaj: phaus (kg)=ntev (mm) × thickness (hli) × Therry × Cov khoom ntom ntom (g \/ cm³) \/ 1000.
Cylindrical Khoom Siv: Qhov hnyav (kg) {0}} × radius² (mm) × siab (g \/ cm³) \/ 1000.
Cov Khoom Siv Hauv Sab: Qhov hnyav (kg)=ntev (hli) × qhov siab (g \/ cm³) \/ 1000.
Qhov ntom ntawm pwm hlau feem ntau yog 7.85 g \/ cm³, uas yog qhov tseem ceeb ntsuas siv thaum laij qhov hnyav.
Kev faib tawm pwm hlau suav nrog cov khoom siv puag ncig thiab cov phiaj. Cov mis rau kev xam qhov hnyav ntawm cov khoom siv puag ncig yog: kab) × init (mm} Qhov hnyav ntawm cov khoom siv puag ncig (kg).
Siv cov qauv no thiab cov tsis muaj, qhov hnyav ntawm cov pwm tuaj yeem suav tau yog.
