## Conversion formula

The conversion factor from feet to millimeters is 304.8, which means that 1 foot is equal to 304.8 millimeters:

1 ft = 304.8 mm

To convert 4.2 feet into millimeters we have to multiply 4.2 by the conversion factor in order to get the length amount from feet to millimeters. We can also form a simple proportion to calculate the result:

1 ft → 304.8 mm

4.2 ft → L(mm)

Solve the above proportion to obtain the length L in millimeters:

L(mm) = 4.2 ft × 304.8 mm

L(mm) = 1280.16 mm

The final result is:

4.2 ft → 1280.16 mm

We conclude that 4.2 feet is equivalent to 1280.16 millimeters:

4.2 feet = 1280.16 millimeters

## Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 millimeter is equal to 0.00078115235595551 × 4.2 feet.

Another way is saying that 4.2 feet is equal to 1 ÷ 0.00078115235595551 millimeters.

## Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that four point two feet is approximately one thousand two hundred eighty point one six millimeters:

4.2 ft ≅ 1280.16 mm

An alternative is also that one millimeter is approximately zero point zero zero one times four point two feet.

## Conversion table

### feet to millimeters chart

For quick reference purposes, below is the conversion table you can use to convert from feet to millimeters

feet (ft) millimeters (mm)
5.2 feet 1584.96 millimeters
6.2 feet 1889.76 millimeters
7.2 feet 2194.56 millimeters
8.2 feet 2499.36 millimeters
9.2 feet 2804.16 millimeters
10.2 feet 3108.96 millimeters
11.2 feet 3413.76 millimeters
12.2 feet 3718.56 millimeters
13.2 feet 4023.36 millimeters
14.2 feet 4328.16 millimeters