## Conversion formula

The conversion factor from kilometers per hour to miles per hour is 0.62137119223783, which means that 1 kilometer per hour is equal to 0.62137119223783 miles per hour:

1 km/h = 0.62137119223783 mph

To convert 6.4 kilometers per hour into miles per hour we have to multiply 6.4 by the conversion factor in order to get the velocity amount from kilometers per hour to miles per hour. We can also form a simple proportion to calculate the result:

1 km/h → 0.62137119223783 mph

6.4 km/h → V(mph)

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

V(mph) = 6.4 km/h × 0.62137119223783 mph

V(mph) = 3.9767756303221 mph

The final result is:

6.4 km/h → 3.9767756303221 mph

We conclude that 6.4 kilometers per hour is equivalent to 3.9767756303221 miles per hour:

6.4 kilometers per hour = 3.9767756303221 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 0.2514599999998 × 6.4 kilometers per hour.

Another way is saying that 6.4 kilometers per hour is equal to 1 ÷ 0.2514599999998 miles per hour.

## Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that six point four kilometers per hour is approximately three point nine seven seven miles per hour:

6.4 km/h ≅ 3.977 mph

An alternative is also that one mile per hour is approximately zero point two five one times six point four kilometers per hour.

## Conversion table

### kilometers per hour to miles per hour chart

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

kilometers per hour (km/h) miles per hour (mph)
7.4 kilometers per hour 4.598 miles per hour
8.4 kilometers per hour 5.22 miles per hour
9.4 kilometers per hour 5.841 miles per hour
10.4 kilometers per hour 6.462 miles per hour
11.4 kilometers per hour 7.084 miles per hour
12.4 kilometers per hour 7.705 miles per hour
13.4 kilometers per hour 8.326 miles per hour
14.4 kilometers per hour 8.948 miles per hour
15.4 kilometers per hour 9.569 miles per hour
16.4 kilometers per hour 10.19 miles per hour