## Conversion formula

The conversion factor from knots to miles per hour is 1.1507794480225, which means that 1 knot is equal to 1.1507794480225 miles per hour:

1 kt = 1.1507794480225 mph

To convert 18.9 knots into miles per hour we have to multiply 18.9 by the conversion factor in order to get the velocity amount from knots to miles per hour. We can also form a simple proportion to calculate the result:

1 kt → 1.1507794480225 mph

18.9 kt → V(mph)

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

V(mph) = 18.9 kt × 1.1507794480225 mph

V(mph) = 21.749731567626 mph

The final result is:

18.9 kt → 21.749731567626 mph

We conclude that 18.9 knots is equivalent to 21.749731567626 miles per hour:

18.9 knots = 21.749731567626 miles per hour

## Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 mile per hour is equal to 0.045977578936582 × 18.9 knots.

Another way is saying that 18.9 knots is equal to 1 ÷ 0.045977578936582 miles per hour.

## Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that eighteen point nine knots is approximately twenty-one point seven five miles per hour:

18.9 kt ≅ 21.75 mph

An alternative is also that one mile per hour is approximately zero point zero four six times eighteen point nine knots.

## Conversion table

### knots to miles per hour chart

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

knots (kt) miles per hour (mph)
19.9 knots 22.901 miles per hour
20.9 knots 24.051 miles per hour
21.9 knots 25.202 miles per hour
22.9 knots 26.353 miles per hour
23.9 knots 27.504 miles per hour
24.9 knots 28.654 miles per hour
25.9 knots 29.805 miles per hour
26.9 knots 30.956 miles per hour
27.9 knots 32.107 miles per hour
28.9 knots 33.258 miles per hour