How to Measure a Fan Blade

Measuring fan blades allows you to pinpoint the exact size of a blade that needs replacing. The measurement can also give you an indication of how big around an entire fan is so you can properly fit it into a space. Getting the length of a fan blade entails dragging a measuring tool, such as a tape measurer or measuring tape, from one end of the blade to the other and jotting down the number. Make sure you measure twice to be certain.

Tape measurer or measuring tape

Instructions

- 1
  Start the measuring tool (tape measurer or measuring tape) at the very tip of the fan blade.
- 2
  Extend the measuring tool along the fan blade and stop at the point where the fan blade meets the fan motor or spindle. Take the measurement a second time to ensure that the length is accurate.
- 3
  Take down the measurement in inches.
- 4
  Measure the fan's entire diameter by measuring the width across the fan motor or spindle, multiplying the length of the fan blade by two and adding the motor or spindle width to that number. Knowing the fan's diameter allows you to adequately fit the fan in a space.

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