Formula Units for mass (body weight) Units for height (or length) Values considered normal or typical for a 12-month-old infant beyond infancy CI = m a s s h e i g h t 3 {\displaystyle {\text{CI}}={\frac {\mathrm {mass} }{\mathrm {height} ^{3}}}} [1] kilograms metres 24[2] 12[3] CI = 1000 m a s s h e i g h t 3 {\displaystyle {\text{CI}}=1000{\frac {\mathrm {mass} }{\mathrm {height} ^{3}}}} [9] grams centimetres (same values as above) CI = h e i g h t m a s s 3 {\displaystyle {\text{CI}}={\frac {\mathrm {height} }{\sqrt[{3}]{\mathrm {mass} }}}} [4][13] pounds inches 12.49 to 13.92