Conversion formula

The conversion factor from miles per hour to knots is 0.8689762419014, which means that 1 mile per hour is equal to 0.8689762419014 knots:

1 mph = 0.8689762419014 kt

To convert 1221 miles per hour into knots we have to multiply 1221 by the conversion factor in order to get the velocity amount from miles per hour to knots. We can also form a simple proportion to calculate the result:

1 mph → 0.8689762419014 kt

1221 mph → V_(kt)

Solve the above proportion to obtain the velocity V in knots:

V_(kt) = 1221 mph × 0.8689762419014 kt

V_(kt) = 1061.0199913616 kt

The final result is:

1221 mph → 1061.0199913616 kt

We conclude that 1221 miles per hour is equivalent to 1061.0199913616 knots:

1221 miles per hour = 1061.0199913616 knots

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 knot is equal to 0.00094248931041978 × 1221 miles per hour.

Another way is saying that 1221 miles per hour is equal to 1 ÷ 0.00094248931041978 knots.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that one thousand two hundred twenty-one miles per hour is approximately one thousand sixty-one point zero two knots:

1221 mph ≅ 1061.02 kt

An alternative is also that one knot is approximately zero point zero zero one times one thousand two hundred twenty-one miles per hour.

Conversion table

miles per hour to knots chart

For quick reference purposes, below is the conversion table you can use to convert from miles per hour to knots