Conversion formula

The conversion factor from kilometers to meters is 1000, which means that 1 kilometer is equal to 1000 meters:

1 km = 1000 m

To convert 640 kilometers into meters we have to multiply 640 by the conversion factor in order to get the length amount from kilometers to meters. We can also form a simple proportion to calculate the result:

1 km → 1000 m

640 km → L_(m)

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

L_(m) = 640 km × 1000 m

L_(m) = 640000 m

The final result is:

640 km → 640000 m

We conclude that 640 kilometers is equivalent to 640000 meters:

640 kilometers = 640000 meters

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 meter is equal to 1.5625E-6 × 640 kilometers.

Another way is saying that 640 kilometers is equal to 1 ÷ 1.5625E-6 meters.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that six hundred forty kilometers is approximately six hundred forty thousand meters:

640 km ≅ 640000 m

An alternative is also that one meter is approximately zero times six hundred forty kilometers.

Conversion table

kilometers to meters chart

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