Critical parameters and acentric factor are important for the estimation of thermodynamic properties. They are also essential in the calculations of phase equilibria and quantities calculated from the equations of state. These properties are difficult to be measured experimentally; heavy hydrocarbons very often decompose at the temperatures below the critical ones. Thus, a lot of methods allowing calculations of these quantities were developed. The methods of Ambrose, Joback, Jalowka and Lin-Chao are the most often used in calculation of critical properties. The methods of Pitzer, Kesler-Lee, Edminster and Lin-Chao are used for the estimation of the acentric factor. The object of this study was the review and determination of the most accurate method. As the result of the study the method of Ambrose is recommended for the estimation of the critical parameters for alkanes and alkanes and the method of Jalowka for aromatic compounds. For determining the acentric factor the methods of Pitzer and Edmister are preferred.