There are a number of spreadsheets available that calculate the chip-loads and surface speeds, as well as estimating the cutting forces and bit deflection, but I made this one with all the data entry in metric. Although the data entry is metric, all the calculations are presented as both metric and imperial to make matching to a tool data sheet simpler.
The spreadsheets are available in the forum post:
Feed, speed, deflection and machine power spread sheet
Evan
Milling Calculator V1.0
spreadsheet for feeds, speeds, tool deflection and milling power