The infrared spectroscopic method was applied for the determination of vinyl acetate '(VA) content in thick films of ethylene-vinyl acetate (EVA) copolymers. From spectral analysis, the A34<IO!'A3610 ratio was used for quantitative determination. This technical measurement is simple, quick, does not require a complicated sample preparation method and also does not need a tedious calculation procedure for the exact determination of vinyl acetate (V A) content. The overall procedure, thus adopted, presents an excellent resemblance with different practically applied methods.