Vapour pressure plays a critically important role in a number of applications ranging from technology to ecology. Thought there is a vast number of compounds with well established vapour pressures, measurements are still needed, especially in the low pressure region (below 1 kPa). Static method is a well established method for vapour pressure measurement. On the other hand, need of very pure and carefully degassed samples makes the method laborious, costly and slow. Methods based on determination of gas-chromatographic retention time are fast and require only a very small amount of the compound. In contrary to most other methods, sample purity is of little concern. Besides these promising features there are some limitations and disadvantages (e.g. activity coefficient problems, accurate data for reference compounds). Combination of the two techniques can solve most of the problems currently encountered.