The theory of ion temperature gradient‐driven turbulence in tokamaks is extended to the flat density regime. The values of ion and electron thermal conductivities, &khgr;iand &khgr;e, momentum diffusivity &khgr;&Jgr;, and particle flux &Ggr;rare also calculated. These formulas extend previous calculations, which were restricted to the regimeLn<(LsLT)1/2[Phys. Fluids29, 3291 (1986); Phys. Fluids31, 1180 (1988)]. This allows an assessment of the role of ion temperature gradient turbulence in H modes, where the density gradient is often observed to be flattened in the plasma core.