## 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 138.5 knots into miles per hour we have to multiply 138.5 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

138.5 kt → V(mph)

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

V(mph) = 138.5 kt × 1.1507794480225 mph

V(mph) = 159.38295355112 mph

The final result is:

138.5 kt → 159.38295355112 mph

We conclude that 138.5 knots is equivalent to 159.38295355112 miles per hour:

138.5 knots = 159.38295355112 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 0.0062741966924289 × 138.5 knots.

Another way is saying that 138.5 knots is equal to 1 ÷ 0.0062741966924289 miles per hour.

## Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that one hundred thirty-eight point five knots is approximately one hundred fifty-nine point three eight three miles per hour:

138.5 kt ≅ 159.383 mph

An alternative is also that one mile per hour is approximately zero point zero zero six times one hundred thirty-eight point five 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)
139.5 knots 160.534 miles per hour
140.5 knots 161.685 miles per hour
141.5 knots 162.835 miles per hour
142.5 knots 163.986 miles per hour
143.5 knots 165.137 miles per hour
144.5 knots 166.288 miles per hour
145.5 knots 167.438 miles per hour
146.5 knots 168.589 miles per hour
147.5 knots 169.74 miles per hour
148.5 knots 170.891 miles per hour