This online calculator converts distance between meters (m) and kilometers (km). It follows the International System of Units (SI) where the decimal prefix kilo equals 10³, giving an exact ratio. Units used: meter (m), kilometer (km).

Meters (m) to Kilometers (km) Converter

Enter a value in meters and press the button to convert it to kilometers.

Meters (m)

Result in Kilometers (km)

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How to use

  1. Enter a value in “Meters (m)”.
  2. Optionally set “Decimal Places” to format the output.
  3. Select “Convert” to compute kilometers (km) and view the calculation line.
  4. Use “Copy Result” to copy the numeric output.
  5. Use “Clear All” to reset inputs and outputs.
  6. “Swap” opens the inverse tool when a link is provided.

Definitions and unit facts

Meter (m) — SI base unit of length defined via the fixed numerical value of the speed of light in vacuum. Exact relation to kilometer: 1 m = 0.001 km. System: SI. Abbreviation: m. Cross-reference: 1 m ≈ 3.28084 feet (ft) in the imperial/US customary system. Typical uses: building dimensions, athletics, pool lengths.

Kilometer (km) — SI length unit formed by the prefix kilo applied to the meter. Exact relation: 1 km = 1000 m. System: SI. Abbreviation: km. Cross-reference: 1 km ≈ 0.621371 miles (mi) in the imperial/US customary system. Typical uses: road distances, race distances, mapping.

Meters to Kilometers Converter - m to km

Conversion formula

kilometers = meters ÷ 1000. Source: NIST — SI Prefixes (kilo = 10³)

Conversion table

Meters (m)Kilometers (km)
10.001
50.005
100.010
250.025
500.050
750.075
1000.100
2500.250
5000.500
7500.750
1,0001.000
1,5001.500
2,0002.000
5,0005.000
10,00010.000
25,00025.000
50,00050.000
100,000100.000
250,000250.000
1,000,0001,000.000

Real-world examples

  • Olympic pool length: 50 m = 0.050 km.
  • Short-course pool length: 25 m = 0.025 km.
  • Standard outdoor track lap: 400 m = 0.400 km.
  • 100 m sprint distance: 100 m = 0.100 km.
  • Rowing course: 2000 m = 2.000 km.
  • 3000 m track event: 3000 m = 3.000 km.
  • 5K road race: 5000 m = 5.000 km.
  • 10K road race: 10,000 m = 10.000 km.
  • Half marathon: 21,097.5 m = 21.0975 km.
  • Marathon: 42,195 m = 42.195 km.

What do you use this tool for? If you need another online calculator, suggest it in the comments and we will consider building it.

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