## 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 knots into miles per hour we have to multiply 138 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 kt → V(mph)

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

V(mph) = 138 kt × 1.1507794480225 mph

V(mph) = 158.80756382711 mph

The final result is:

138 kt → 158.80756382711 mph

We conclude that 138 knots is equivalent to 158.80756382711 miles per hour:

138 knots = 158.80756382711 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 0.0062969292891406 × 138 knots.

Another way is saying that 138 knots is equal to 1 ÷ 0.0062969292891406 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 knots is approximately one hundred fifty-eight point eight zero eight miles per hour:

138 kt ≅ 158.808 mph

An alternative is also that one mile per hour is approximately zero point zero zero six times one hundred thirty-eight 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 knots 159.958 miles per hour
140 knots 161.109 miles per hour
141 knots 162.26 miles per hour
142 knots 163.411 miles per hour
143 knots 164.561 miles per hour
144 knots 165.712 miles per hour
145 knots 166.863 miles per hour
146 knots 168.014 miles per hour
147 knots 169.165 miles per hour
148 knots 170.315 miles per hour