Conversion formula

The conversion factor from millimeters to feet is 0.0032808398950131, which means that 1 millimeter is equal to 0.0032808398950131 feet:

1 mm = 0.0032808398950131 ft

To convert 420.5 millimeters into feet we have to multiply 420.5 by the conversion factor in order to get the length amount from millimeters to feet. We can also form a simple proportion to calculate the result:

1 mm → 0.0032808398950131 ft

420.5 mm → L_(ft)

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

L_(ft) = 420.5 mm × 0.0032808398950131 ft

L_(ft) = 1.379593175853 ft

The final result is:

420.5 mm → 1.379593175853 ft

We conclude that 420.5 millimeters is equivalent to 1.379593175853 feet:

420.5 millimeters = 1.379593175853 feet

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 foot is equal to 0.72485136741974 × 420.5 millimeters.

Another way is saying that 420.5 millimeters is equal to 1 ÷ 0.72485136741974 feet.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that four hundred twenty point five millimeters is approximately one point three eight feet:

420.5 mm ≅ 1.38 ft

An alternative is also that one foot is approximately zero point seven two five times four hundred twenty point five millimeters.

Conversion table

millimeters to feet chart

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