With this online calculator you can calculate the mixing of water at different temperatures.
Formula:
TM = (V1*T1 + V2*T2) / (V1 + V2)
TM - mix temperature, °С
V1 - hot water volume, ml
T1 - hot water temperature, °С
V2 - cold water volume, ml
T3 - cold water temperature, °С
Mixing water of different temperatures is the process of changing the temperature of water when it is combined into a total volume.