Conversion formula

The conversion factor from yards to kilometers is 0.0009144, which means that 1 yard is equal to 0.0009144 kilometers:

1 yd = 0.0009144 km

To convert 4221 yards into kilometers we have to multiply 4221 by the conversion factor in order to get the length amount from yards to kilometers. We can also form a simple proportion to calculate the result:

1 yd → 0.0009144 km

4221 yd → L_(km)

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

L_(km) = 4221 yd × 0.0009144 km

L_(km) = 3.8596824 km

The final result is:

4221 yd → 3.8596824 km

We conclude that 4221 yards is equivalent to 3.8596824 kilometers:

4221 yards = 3.8596824 kilometers

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 kilometer is equal to 0.25908867527546 × 4221 yards.

Another way is saying that 4221 yards is equal to 1 ÷ 0.25908867527546 kilometers.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that four thousand two hundred twenty-one yards is approximately three point eight six kilometers:

4221 yd ≅ 3.86 km

An alternative is also that one kilometer is approximately zero point two five nine times four thousand two hundred twenty-one yards.

Conversion table

yards to kilometers chart

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