Convert Femtoliter (fL) to Drop (drop) instantly.
About these units
Femtoliter (fL)
A femtoliter represents 10⁻¹⁵ liters and is commonly used in hematology, particularly in describing red blood cell size. A typical red blood cell has a volume of roughly 80–100 fL, making this unit ideal for medical diagnostics. Beyond medicine, femtoliters are used in microfluidics and nanoparticle research, where reaction chambers or droplets often hold only a few dozen femtoliters of liquid. The femtoliter exemplifies how modern science pushes measurement into realms dominated by statistical motion, molecular interactions, and quantum effects—scales that once seemed impossible to quantify.
Drop (drop)
The drop is one of the oldest fluid measures and originally referred simply to the amount of liquid that naturally forms at the end of a dripping vessel. Because drop size depends on viscosity, surface tension, temperature, and orifice size, early medicine found drops inconsistent and unreliable. Modern medicine and chemistry sometimes define a drop as 0.05 mL, but this is only a convention used for standardized droppers—real drops can vary significantly. Despite its imprecision, the drop survives in everyday language, aromatherapy, essential oils, and household instructions ("add a few drops"). It exemplifies humanity's earliest attempts to quantify small volumes before scientific instrumentation enabled precise micro-measurement.