Vane shear strength and cone resistance for Scandinavian soft to medium stiff clay has been compared for six different sites in Norway and Sweden. At five of the sites, three in Drammen, one in Onsoy, and one in Goteborg, the clays have been sedimented in an entirely marine environment. At the Ska-Edeby site the conditions have been marine-brackish or brackish-marine. When compared with the standard field vane shear strength, the cone factor, N, varies between 13 and 24 for the five marine clays. For the Ska-Edeby clay the Mk values lie in the range 8 to 12. Corrections of field vane shear strength result, for the five marine clays, in Nk values between 15 and 19 with an average of 17. This Nk value can be used for Scandinavian marine normally consolidated clays, but may not be valid in other types of clays. An example of this is the Ska-Edeby brackish-marine clay where the corrected Nk values fall between 11 and 13. /Author/