This paper presents a new family of Interference routing metrics, ILR (interference level routing), ILRk (interference level routing to the power of k) and ILRth (interference level routing with a threshold value) for wireless ad hoc networks. Unlike conventional routing metrics, such as shortest path, these proposed routing metrics have been replaced with weight metrics that take into account the combination of node inward and outward interference. By assigning and adjusting the value of the interference level factor in the metrics, the priority of 'inconvenience' and 'disturbance' can be controlled. The performance of the proposed routing metrics is examined and compared with conventional shortest path routing. The simulation results show that these proposed routing metrics improve load balancing to provide enhanced network capacity and reduced bottlenecks.