Kilometer to Meter Conversion Calculator (km ↔ m)
Convert between kilometres and metres in either direction. Also shows the equivalent in centimetres, millimetres, miles, feet and yards.
Direction
km
Exact SI conversion — 1 km = 1 000 m
- 1
Conversion factor
1 km = 1,000 m = 1,000Exact SI definition — kilo- means 1 000. - 2
Convert to metres
1 × 1,000 = 1,000
How does this calculator work?
Multiply kilometres by 1 000 to get metres (1 km = 1 000 m exactly — a pure SI power-of-ten). Divide metres by 1 000 to go back. Centimetres = metres × 100, millimetres = metres × 1 000. To get miles, divide metres by 1 609.344.
Formula
How this is calculated
The kilometre and metre are both SI (International System of Units) units of length. One kilometre is defined as exactly 1 000 metres — this is a pure power-of-ten relationship, so conversion is exact and involves no rounding. Going km → m is simply multiplication by 1 000; going m → km is division by 1 000.
Centimetres and millimetres follow the same decimal chain: 1 m = 100 cm = 1 000 mm, so 1 km = 100 000 cm = 1 000 000 mm. All conversions within the metric system are exact.
Imperial equivalents use exact definitions adopted in 1959: 1 international mile = 1 609.344 m exactly, 1 foot = 0.3048 m exactly, 1 yard = 0.9144 m exactly, 1 inch = 0.0254 m exactly. These are used for the additional columns shown in the stats grid.
Frequently asked questions
There are exactly 1 000 metres in one kilometre. The prefix "kilo-" means 1 000 in the SI system, so 1 km = 1 000 m, 1 kg = 1 000 g, 1 kL = 1 000 L, and so on.
Multiply kilometres by 0.621371 to get miles (or divide by 1.609344). The exact definition is 1 mile = 1 609.344 m, so 1 km = 1 000 ÷ 1 609.344 ≈ 0.621371 miles.
5 km × 1 000 = 5 000 m. It is also 500 000 cm, 5 000 000 mm, approximately 3.107 miles, about 16 404 feet, and about 5 468 yards.
Also known as
TG we-Calculate Editorial Team. (2026). Kilometer to Meter Conversion Calculator (km ↔ m) [Online calculator]. TG we-Calculate. https://we-calculate.com/calculator/kilometer-meter-conversion-calculator
TG we-Calculate Editorial Team. "Kilometer to Meter Conversion Calculator (km ↔ m)." TG we-Calculate. 2026. https://we-calculate.com/calculator/kilometer-meter-conversion-calculator.
TG we-Calculate Editorial Team, "Kilometer to Meter Conversion Calculator (km ↔ m)," TG we-Calculate, 2026. [Online]. Available: https://we-calculate.com/calculator/kilometer-meter-conversion-calculator
@misc{wecalculate_kilometer_meter_conversion_calculator, title = {Kilometer to Meter Conversion Calculator (km ↔ m)}, author = {{TG we-Calculate Editorial Team}}, howpublished = {\url{https://we-calculate.com/calculator/kilometer-meter-conversion-calculator}}, year = {2026}, note = {TG we-Calculate} }
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