Conversion formula

The conversion factor from feet to miles is 0.00018939393939394, which means that 1 foot is equal to 0.00018939393939394 miles:

1 ft = 0.00018939393939394 mi

To convert 21.3 feet into miles we have to multiply 21.3 by the conversion factor in order to get the length amount from feet to miles. We can also form a simple proportion to calculate the result:

1 ft → 0.00018939393939394 mi

21.3 ft → L(mi)

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

L(mi) = 21.3 ft × 0.00018939393939394 mi

L(mi) = 0.0040340909090909 mi

The final result is:

21.3 ft → 0.0040340909090909 mi

We conclude that 21.3 feet is equivalent to 0.0040340909090909 miles:

21.3 feet = 0.0040340909090909 miles

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 mile is equal to 247.88732394366 × 21.3 feet.

Another way is saying that 21.3 feet is equal to 1 ÷ 247.88732394366 miles.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that twenty-one point three feet is approximately zero point zero zero four miles:

21.3 ft ≅ 0.004 mi

An alternative is also that one mile is approximately two hundred forty-seven point eight eight seven times twenty-one point three feet.

Conversion table

feet to miles chart

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

feet (ft) miles (mi)
22.3 feet 0.004 miles
23.3 feet 0.004 miles
24.3 feet 0.005 miles
25.3 feet 0.005 miles
26.3 feet 0.005 miles
27.3 feet 0.005 miles
28.3 feet 0.005 miles
29.3 feet 0.006 miles
30.3 feet 0.006 miles
31.3 feet 0.006 miles