The balance scheme of trichlorosilane production based on hydrochlorination of elemental silicon was worked out with the use of Microsoft Excel. The scheme includes the following steps: synthesis of hydrogen chloride, synthesis of trichlorosilane, separation of vapor-gas mixture and purification of trichlorosilane. If the user modifies the calculation conditions, the scheme allows to re-count automatically the material flows, specific consumption coefficients etc., and also to check the correspondence between the balance data obtained in the calculation process and required indices of production.