In this paper, empirical relationships are derived to determine the mass and geometry of icebergs based on instrumental measurements and airborne data in the Barents, Kara and Laptev Seas. This work was performed during research expeditions conducted by Arctic and Antarctic Research Institute together with Rosneft Oil Company and Arctic Research Centre in 2012-17. The authors give regression dependencies between: 1D parameters of icebergs (length, width, height, draft); linear and area parameters of icebergs (cross section area of the above and underwater parts of icebergs); linear iceberg parameters and its volume and mass. Obtained empirical relations for the iceberg geometry and mass can be used to simulate the drift of icebergs and to estimate their impact on offshore structures and vessels.