Metric Conversions (3.5e Variant Rule)
From D&D Wiki
Because D&D comes from the good old USA, all the measurements are in imperial. Because I prefer metric measurements, here are the various changes made (note that the conversions are not extremely exact for the sake of simplicity:
- Each square is 1m by 1m on a board. You might need bigger boards, if that's okay.
- Movement speed is divided by 3 (30ft =~ 10m. Therefore, a creature with 10m land speed can move 10 squares as a move action. This also eliminates the need for math with movement speed!)
- Height, weight, etc., are given in cm and kg, respectively.
- Spells, etc., are also converted to metric measurements. If you don't want to bother with this, using metric is probably not a good idea.