The tools here are originally prepared for my employees, but are provided free of charge to all film-makers.

Explanation
DATA TO TIME - Calculate the time to copy by the amount of data and transfer speed.
MEDIA TO TIME - Calculate the recordable time from media size and codec, resolution, framerate. 
CODEC TO DATA - Calculate the amount of data from camera and codec, resolution, framerate. 
DEPTH OF FIELD - Calculate depth of field from focal length and focus position, sensor information
TO OFFLINE - Calculate the resolution of offline media - frameline used on set is just HD 1920*1080
EXPOSURE CONVERT - Check the difference in EV value when changing the frame rate, aperture, etc.
FRAMING - Calculate the H / V range that fits in the frame by sensor, ,focal length, distance.

Notes
It doesn't deal with the problems caused by the accuracy and design mistakes of this tool.
But we want you to feel free to use these tools if you need them.