* Drop size varies: The size of a drop depends on many factors, including:
* The dropper: Different droppers have different sized openings.
* The liquid's viscosity: Thicker liquids produce larger drops.
* Surface tension: How strongly the liquid's molecules attract each other influences drop size.
* Temperature: Warmer liquids tend to form smaller drops.
* Environmental factors: Even with the same dropper and liquid, air humidity and pressure can affect drop size.
Therefore, the number of drops per fluid ounce is highly variable and unreliable for precise measurements.
If you need accurate measurements, use a measuring cup, graduated cylinder, or other calibrated tools.
