The Mosteller¹ formula

BSA (m²) = ( [Height(cm) x Weight(kg) ]/ 3600 )½        e.g. BSA = SQRT( (cm*kg)/3600 )
or in inches and pounds:     BSA (m²) = ( [Height(in) x Weight(lbs) ]/ 3131 )½

The DuBois and DuBois² formula

BSA (m²) = 0.20247 x Height(m)0.725 x Weight(kg)0.425
A variation of DuBois and DuBois15 thats gives virtually identical results is:
BSA (m²) = 0.007184 x Height(cm)0.725 x Weight(kg)0.425

The Haycock³ formula

BSA (m²) = 0.024265 x Height(cm)0.3964 x Weight(kg)0.5378

The Gehan and George4 formula

BSA (m²) = 0.0235 x Height(cm)0.42246 x Weight(kg)0.51456

The Boyd formula5

BSA (m2) = 0.0003207 x Height(cm)0.3 x Weight(grams)(0.7285 - ( 0.0188 x LOG(grams) )