The surface tension of a liquid is associated with many effects such as capillary forces, meniscus formation at walls of a vessel containing liquid, shaping of drops of liquid, etc. In a basis of these physical phenomena are interatomic and intermolecular forces both inside of a liquid and on the surfaces of contact of a liquid with environment and solid substances. It is confirmed by the evident and well-known interrelation of surface tension with vaporation heat of liquids. Researches of apparently quite clear physical phenomena in liquids with the purpose to get more exact and detailed knowledge are caused by requirements of modern techniques and technologies development. It concerns in full with studying of liquids properties in a drop state. In given article the solution method of a problem on the form of a drop of liquid in the gravitational field, convenient for the numerical solution on modern computers, specifically is presented. Examples of this problem solution are offered and some characteristic results are shown.