Drag Coefficient Calculator

Select Shape
Reynolds number
Please enter a Reynolds number larger than zero.
Units
Velocity
ft/s
Diameter
in
Fluid

Information

The above program computes the drag coefficient from a set of functions that were fitted to experimental data. The precision given above goes well beyond the precision of the experimental data. To get a sense of the quality of the fits the data has been plotted here for:
   Smooth spheres
   Long smooth cylinders
   Elliptical cylinder 2:1
   Circular disks

Usage examples

Interactive summary plot