A rapid assay based on flotation / sedimentation technique was carried out to estimate ash, calcium and phosphorus along with CP and EE content of meat and bone meal (MBM). Forty samples of commercial MBM were assayed for ash, Ca, P, CP and EE using the standard procedures. Twenty gram of the assayed sample was mixed with 60 ml chloroform in 100 ml graduated cylinder, the bone precipitates to the bottom, meat floats and fats are dissolved. The precipitated bone was measured as ml. Bone volume (ml) was highly significant (P<0.01) correlated with ash, Ca, P and protein content of MBM. The correlation between bone volume and EE content was not significant. The resulted prediction equations to estimate ash, Ca, P, CP and EE in MBM samples are: % Ash = -2.38 + 2.78 (ml bone), R² = 0.81 % Ca = 1.71 + 0.778 (ml bone), R² = 0.59 % P = 1.30 + 0.336 (ml bone), R² = 0.37 % CP = 70.90 – 1.771 (ml bone), R² = 0.46 % EE = 15.00 – 0.329 (ml bone), R² = 0.07   The relatively lower values of R² are mainly due to a reasonable consistency in the tested samples. It could be concluded that the use of such rapid assay can provide a reliable estimate of the Ca, P,CP and ash content of MBM.