Conversion formula

The conversion factor from knots to kilometers per hour is 1.8519999999969, which means that 1 knot is equal to 1.8519999999969 kilometers per hour:

1 kt = 1.8519999999969 km/h

To convert 420 knots into kilometers per hour we have to multiply 420 by the conversion factor in order to get the velocity amount from knots to kilometers per hour. We can also form a simple proportion to calculate the result:

1 kt → 1.8519999999969 km/h

420 kt → V_(km/h)

Solve the above proportion to obtain the velocity V in kilometers per hour:

V_(km/h) = 420 kt × 1.8519999999969 km/h

V_(km/h) = 777.83999999871 km/h

The final result is:

420 kt → 777.83999999871 km/h

We conclude that 420 knots is equivalent to 777.83999999871 kilometers per hour:

420 knots = 777.83999999871 kilometers per hour

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 kilometer per hour is equal to 0.0012856114368015 × 420 knots.

Another way is saying that 420 knots is equal to 1 ÷ 0.0012856114368015 kilometers per hour.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that four hundred twenty knots is approximately seven hundred seventy-seven point eight four kilometers per hour:

420 kt ≅ 777.84 km/h

An alternative is also that one kilometer per hour is approximately zero point zero zero one times four hundred twenty knots.

Conversion table

knots to kilometers per hour chart

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