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 640 yards into kilometers we have to multiply 640 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

640 yd → L_(km)

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

L_(km) = 640 yd × 0.0009144 km

L_(km) = 0.585216 km

The final result is:

640 yd → 0.585216 km

We conclude that 640 yards is equivalent to 0.585216 kilometers:

640 yards = 0.585216 kilometers

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 kilometer is equal to 1.7087707786527 × 640 yards.

Another way is saying that 640 yards is equal to 1 ÷ 1.7087707786527 kilometers.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that six hundred forty yards is approximately zero point five eight five kilometers:

640 yd ≅ 0.585 km

An alternative is also that one kilometer is approximately one point seven zero nine times six hundred forty 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