Software is designed for Energy Calibration of Pixel Detectors working in Time-Over-Threshold Mode. From calibration data software evaluate calibration function for each pixel of detector, which gives dependency on particle energy of TOT. Input data are represented by two up to ten measurements for different radiation sources, whose energies are known. Software provides tools for visualization of calibration process and for evaluation of quality of calibration and of the detector. Software can be used separately or as a Pixelman plugin and it was developed in Java language.