You can't directly convert "knots" to "mph" because they are both units of speed, but they are based on different reference points.

* Knots (kt) are a unit of speed used in nautical navigation. One knot is equal to one nautical mile per hour.

* Miles per hour (mph) is a unit of speed based on statute miles per hour.

To convert knots to mph, you need to use a conversion factor:

1 knot = 1.15078 mph

Therefore, 6 knots is equal to:

6 knots * 1.15078 mph/knot = 6.90468 mph