The temperature at which ice converts to water is commonly referred to as the melting point or freezing point of water. The melting point of pure water at standard atmospheric pressure (1 atmosphere or 101.325 kPa) is 0 degrees Celsius (32 degrees Fahrenheit).
At this temperature, ice transitions from its solid state to a liquid state, and the molecules within the ice gain enough energy to break their organized lattice structure and move more freely as liquid water. Conversely, when liquid water is cooled to this temperature, it will solidify and transform into ice.
It's worth noting that the melting point of water can be influenced by factors such as pressure and the presence of impurities. Increasing pressure generally lowers the melting point of water, while the presence of impurities (such as dissolved salts) can raise or lower the melting point depending on the specific substances involved.
In summary, the temperature required to convert ice to water is 0 degrees Celsius (32 degrees Fahrenheit) under standard atmospheric pressure.