How to Read a Car Tachometer?

[AdelynLee]

Here is an introduction on how to read a car tachometer: 1. Most car tachometers have a similar design. Typically, the indicated number on the tachometer multiplied by 1000 or 100 gives the engine's revolutions per minute (RPM). The tachometer has several zones: the white scale indicates that the current RPM is within the safe range, while the red scale represents the dangerous RPM range. Some models also feature a green zone, which indicates the economical range. 2. Once you understand the zones on the tachometer, you can easily and intuitively determine whether the car's RPM is within the safe range. If you need the exact RPM, simply multiply the number on the tachometer by 1000 or 100. If you only need to know the RPM zone, observe whether the current needle position is in the white or red zone.