Convert Cubic Kilometer (km³) to Femtoliter (fL) instantly.
About these units
Cubic Kilometer (km³)
A cubic kilometer represents one billion cubic meters, making it a colossal volume unit used in geology, hydrology, glaciology, and planetary science. Large lakes, ice sheets, magma chambers, and atmospheric water content are often measured in km³. Earth's total ocean volume—about 1.335 billion km³—illustrates the unit's utility in describing planetary-scale systems. The km³ gives scientists a manageable number when dealing with natural features too massive for cubic meters or liters to express conveniently.
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.