A method for wrapping a load (60) with a film (50) by a wrapping machine (100) comprising an unwinding apparatus (10) provided with a reel (3) of said film (50) comprises moving said wrapping apparatus (10) and said load (60) in relation to one another, unwinding from said reel (3) an established effective length (Lfe) of film (50) per revolution of said wrapping apparatus (10) or of said load (60); the established effective length (Lfe) of film (50) is calculated with the formula (I): where : Sf. initial length of film (50) determined on the basis of dimensions and/or shape of said load (60); ?: rotation speed around a wrapping axis (W) of said unwinding apparatus (10) or of said load (60); Vt : movement speed of said unwinding apparatus (10) parallel to said rotation axis (W); ?max: maximum rotation speed around said wrapping axis (W) of said unwinding apparatus (10) or of said load (60); ?corr: corrective parameter.
