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Unit Converter

Conversion formula

The conversion factor from feet to centimeters is 30.48, which means that 1 foot is equal to 30.48 centimeters:

1 ft = 30.48 cm

To convert 21 feet into centimeters we have to multiply 21 by the conversion factor in order to get the length amount from feet to centimeters. We can also form a simple proportion to calculate the result:

1 ft → 30.48 cm

21 ft → L(cm)

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

L(cm) = 21 ft × 30.48 cm

L(cm) = 640.08 cm

The final result is:

21 ft → 640.08 cm

We conclude that 21 feet is equivalent to 640.08 centimeters:

21 feet = 640.08 centimeters

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 centimeter is equal to 0.001562304711911 × 21 feet.

Another way is saying that 21 feet is equal to 1 ÷ 0.001562304711911 centimeters.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that twenty-one feet is approximately six hundred forty point zero eight centimeters:

21 ft ≅ 640.08 cm

An alternative is also that one centimeter is approximately zero point zero zero two times twenty-one feet.

Conversion table

feet to centimeters chart

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

feet (ft) centimeters (cm)
22 feet 670.56 centimeters
23 feet 701.04 centimeters
24 feet 731.52 centimeters
25 feet 762 centimeters
26 feet 792.48 centimeters
27 feet 822.96 centimeters
28 feet 853.44 centimeters
29 feet 883.92 centimeters
30 feet 914.4 centimeters
31 feet 944.88 centimeters