21 feet in yards

Conversion

21 feet is equivalent to 7 yards.^[1]

Conversion formula
How to convert 21 feet to yards?

We know (by definition) that: $1 ft \approx 0.33333333 yd$

We can set up a proportion to solve for the number of yards.

\frac{1 ft}{21 ft} \approx \frac{0.33333333 yd}{x yd}

Now, we cross multiply to solve for our unknown $x$ :

x yd \approx \frac{21 ft}{1 ft} * 0.33333333 yd \to x yd \approx 6.9999999299999995 yd

Conclusion: $21 ft \approx 6.9999999299999995 yd$

Conversion in the opposite direction

The inverse of the conversion factor is that 1 yard is equal to 0.142857142857143 times 21 feet.

It can also be expressed as: 21 feet is equal to $\frac{1}{0.142857142857143}$ yards.

Approximation

An approximate numerical result would be: twenty-one feet is about zero yards, or alternatively, a yard is about zero point one four times twenty-one feet.

Units involved

This is how the units in this conversion are defined:

Feet

The foot is a unit of length in the imperial and US customary systems of measurement. Since 1959, both units have been defined by international agreement as equivalent to 0.3048 meters exactly. In both systems, the foot comprises 12 inches and three feet compose a yard.

Wikipedia page of feet

Yards

The yard (abbreviation: yd) is an English unit of length, in both the British imperial and US customary systems of measurement, that comprises 3 feet or 36 inches. It is by international agreement in 1959 standardized as exactly 0.9144 meters. A metal yardstick originally formed the physical standard from which all other units of length were officially derived in both English systems.

Wikipedia page of yards

Footnotes

[1] The precision is 15 significant digits (fourteen digits to the right of the decimal point).

Results may contain small errors due to the use of floating point arithmetic.

Conversion

Conversion formula How to convert 21 feet to yards?

Conversion in the opposite direction

Approximation

Conversion formula
How to convert 21 feet to yards?