The standard Guided Tours of Amsterdam, Rotterdam, The Hague, Haarlem, Utrecht & Delft are a little over 5 kilometres long, or around 3 miles.
The Alternative Tour Amsterdam covers a little under 5 kilometres, or around 2.7 miles.
The Dark Side Tour Amsterdam is a little over 5 km, or around 3 miles.
The Food Tour Amsterdam is the shortest due to its many taste-stops with only 2,3 km or 1.5 miles to conquer.
The Educational Tour Amsterdam is the same distance as the standard Historical Tour Amsterdam, a little over 5 km or 3 miles.