What units of temperature and precipitation does the KBDIS tool use?
Answer: the KBDIS tool expects temperature in degrees Celsius (°C) and precipitation in millimetres (mm). Enter daily maximum temperature in °C and daily rainfall in mm; the tool handles the internal conversion used in the original Keetch-Byram formulation. DMAP V2.1 also calculates the KBDI and 18 other drought indices automatically.
You should enter the Tmax in Centigrade and precipitation in mm. These are Our Papers that we used the tools for. You can find the KBDI paper on it.