One nautical mile per hour is equal to approximately 1.15 mph, so the conversion value for knots to mph is 1.15.
Multiple the value in knots, which is 60, by 1.15. The equation is: 60 x 1.15 = 69.
The final step is to label the resulting number with the correct unit. For this equation, 60 knots is equal to 69 mph.