## 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 397 kilometers per hour into miles per hour we have to multiply 397 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

397 km/h → V(mph)

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

V(mph) = 397 km/h × 0.62137119223783 mph

V(mph) = 246.68436331842 mph

The final result is:

397 km/h → 246.68436331842 mph

We conclude that 397 kilometers per hour is equivalent to 246.68436331842 miles per hour:

397 kilometers per hour = 246.68436331842 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 0.0040537632241781 × 397 kilometers per hour.

Another way is saying that 397 kilometers per hour is equal to 1 ÷ 0.0040537632241781 miles per hour.

## Approximate result

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

397 km/h ≅ 246.684 mph

An alternative is also that one mile per hour is approximately zero point zero zero four times three hundred ninety-seven 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)
398 kilometers per hour 247.306 miles per hour
399 kilometers per hour 247.927 miles per hour
400 kilometers per hour 248.548 miles per hour
401 kilometers per hour 249.17 miles per hour
402 kilometers per hour 249.791 miles per hour
403 kilometers per hour 250.413 miles per hour
404 kilometers per hour 251.034 miles per hour
405 kilometers per hour 251.655 miles per hour
406 kilometers per hour 252.277 miles per hour
407 kilometers per hour 252.898 miles per hour