Food security concepts are extensively used in households as a measure of welfare, to conceptualise operational usefulness in the design, implementation, and evaluation of policies. Most research is focused on improving food security and sustainability and the patterns still remain tenuous. This article explores food security indicators for sustainability by using system dynamics to understand the interconnectedness of the food security system. This is done by analysing quantitative and qualitative concepts of food security indicators. The simulation result shows dynamics of cropland decreasing with increasing population as they need food, energy and space to survive.