How many degrees Celsius is one bar on the water temperature gauge?

[McCooper]

Each small bar on the car's water temperature gauge represents 15 degrees, while each large bar represents 30 degrees. Normal water temperature: Water temperature refers to the coolant temperature. After the engine warms up, it typically displays 70-90°C as normal. When the coolant level in the radiator is low, the water temperature will rise, requiring additional water. If the temperature gauge approaches the "H" mark or enters the red danger zone, and in severe cases the water temperature warning light illuminates, this indicates the engine coolant temperature is too high. How the water temperature gauge works: The water temperature gauge sensor is a thermistor-type sensor that's threaded into the engine's coolant passage. The thermistor determines the amount of current flowing through the gauge's coil windings, which drives the movement of the needle on the gauge.