The optimal setting on an induction cooktop for boiling water is typically around 800 to 1000 watts. This range ensures that the cooktop generates enough heat to bring water to a boil efficiently while minimizing energy consumption. Induction cooktops work by creating a magnetic field that heats the pot directly, which means the surface of the cooktop itself does not get hot. This allows for precise temperature control, making it easier to maintain the ideal setting for boiling water.

The reason for this setting is based on the principles of heat transfer and the efficiency of induction cooking. Water boils at 212°F (100°C) at sea level. To achieve this temperature, the cooktop needs to provide enough energy to overcome the latent heat of vaporization of water. The 800 to 1000 watts range is sufficient to do this without overheating the cooktop or the pot, which can lead to energy waste and potential damage to the cookware.

According to a study by the U.S. Department of Energy, induction cooktops are up to 90% energy-efficient compared to traditional electric cooktops, which are around 60% efficient. This efficiency is due to the fact that induction cooktops only heat the pot and not the surrounding air, reducing heat loss. By setting the cooktop to 800 to 1000 watts, users can take advantage of this efficiency while ensuring that the water reaches boiling point quickly and safely.