A method, an apparatus, and a computer program are provided for predicting power consumption for chip. The model for predicting power consumptions is modified so at to provide a high degree of accuracy with a minimal amount of computing time. Traditionally, when modeling a chip, a vast amount of time and computer resources were required to predict power consumption. Techniques required less time and less computer power, but the accuracy also decreased. However, by breaking down a chip into macros and developing energy rules for each macro, simple techniques can be employed to accurately predict power consumption under real world conditions with a minimal amount of time and computing power.