## 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 428 kilometers per hour into miles per hour we have to multiply 428 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

428 km/h → V(mph)

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

V(mph) = 428 km/h × 0.62137119223783 mph

V(mph) = 265.94687027779 mph

The final result is:

428 km/h → 265.94687027779 mph

We conclude that 428 kilometers per hour is equivalent to 265.94687027779 miles per hour:

428 kilometers per hour = 265.94687027779 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 0.0037601495327073 × 428 kilometers per hour.

Another way is saying that 428 kilometers per hour is equal to 1 ÷ 0.0037601495327073 miles per hour.

## Approximate result

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

428 km/h ≅ 265.947 mph

An alternative is also that one mile per hour is approximately zero point zero zero four times four hundred twenty-eight 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)
429 kilometers per hour 266.568 miles per hour
430 kilometers per hour 267.19 miles per hour
431 kilometers per hour 267.811 miles per hour
432 kilometers per hour 268.432 miles per hour
433 kilometers per hour 269.054 miles per hour
434 kilometers per hour 269.675 miles per hour
435 kilometers per hour 270.296 miles per hour
436 kilometers per hour 270.918 miles per hour
437 kilometers per hour 271.539 miles per hour
438 kilometers per hour 272.161 miles per hour