Kilometers to Meters Converter

About the km to m calculation

One kilometer is exactly 1,000 meters, so converting between them is a single multiplication. Enter any value above and the result updates as you type. The standard road-distance unit in most of the world. The SI base unit of length, defined by the distance light travels in 1/299,792,458 of a second.

Formula

m = km × 1,000

1 km = 1,000 m
1 m = 0.001 km

Worked example

To convert 10 km, multiply by 1,000: 10 × 1,000 = 10,000 m.

Frequently asked questions

How many meters are in a kilometer?

There are 1,000 meters in one kilometer. To convert any amount, multiply the number of kilometers by 1,000.

How do I convert meters back to kilometers?

Divide instead of multiplying, or equivalently multiply by 0.001. One meter is 0.001 kilometers.

Is this conversion exact?

Yes. Since the international agreement of 1959, the relationship between kilometers and meters is defined exactly rather than measured, so the only rounding here is in how many decimal places we show.

Where is each of these units used?

Kilometers: the standard road-distance unit in most of the world. Meters: the SI base unit of length, defined by the distance light travels in 1/299,792,458 of a second.

Sources

• NIST Special Publication 811 — Guide for the Use of the International System of Units