Convert Kilometers to Decimetres
1 kilometer is 10,000 dm. One kilometer is exactly 10000 decimetres.
One kilometer is 10000 decimetres. To convert kilometers to decimetres, multiply by 10000; to go the other way, divide by 10000 or multiply by 1.0000 × 10^-4. The factor is exact rather than rounded: it follows from NIST. One thousand meters, and about 0.621 miles.
Factor checked against the defining standard · How we check
- Kilometers × 10000
1 * 1000010,000 dm
1 kilometer in every length unit
| Unit | Value | Exact factor |
|---|---|---|
| inches | 39,370.07874 in | × 39,370.0787402 |
| feet | 3,280.839895 ft | × 3,280.83989501 |
| yards | 1,093.613298 yd | × 1,093.61329834 |
| miles | 0.6213711922 mi | × 0.621371192237 |
| millimeters | 1,000,000 mm | × 1,000,000 |
| decimetres | 10,000 dm | × 10,000 |
| centimeters | 100,000 cm | × 100,000 |
| meters | 1,000 m | × 1,000 |
| kilometers (as entered) | 1 km | — |
| nautical miles | 0.5399568035 nmi | × 0.539956803456 |
| micrometers | 1,000,000,000 µm | × 1,000,000,000 |
| nanometers | 1,000,000,000,000 nm | × 1,000,000,000,000 |
| thou | 39,370,078.74 thou | × 39,370,078.7402 |
Factors are entered by hand from NIST rather than derived from a units library, so the ones that terminate are exact rather than rounded.
The same converter answers this pair however it is written: kilometres to decimetres is the British spelling of the same units — the metre and the litre are spelled that way outside the United States and the quantity does not change.
How do you convert kilometers to decimetres? The converter and the working
- 1.Take the measurement in kilometers.
- 2.Multiply by 10000 — that is how many decimetres fit in one kilometer.
- 3.To go back the other way, divide by 10000, or multiply by 1.0000 × 10^-4.
Worked example: 25 kilometers to decimetres
- Formula
- km × 10000 = dm
- Arithmetic
- 25 × 10000 = 250,000 dm
- Answer
- 25 km = 250,000 dm
The factor is exact, so this figure is exact too — only the display is rounded.
Kilometers to decimetres conversion table
| Kilometers | Decimetres |
|---|---|
| 1 km | 10,000 dm |
| 2 km | 20,000 dm |
| 3 km | 30,000 dm |
| 4 km | 40,000 dm |
| 5 km | 50,000 dm |
| 6 km | 60,000 dm |
| 7 km | 70,000 dm |
| 8 km | 80,000 dm |
| 9 km | 90,000 dm |
| 10 km | 100,000 dm |
| 12 km | 120,000 dm |
| 15 km | 150,000 dm |
| 20 km | 200,000 dm |
| 25 km | 250,000 dm |
| 50 km | 500,000 dm |
| 100 km | 1,000,000 dm |
| 200 km | 2,000,000 dm |
| 300 km | 3,000,000 dm |
| 500 km | 5,000,000 dm |
| 1000 km | 10,000,000 dm |
| 2000 km | 20,000,000 dm |
| 5000 km | 50,000,000 dm |
| 10000 km | 100,000,000 dm |
What is a kilometer?
One thousand meters, and about 0.621 miles.
What is a decimetre?
A tenth of a metre. Rare in speech and unavoidable in definitions: the litre is a cubic decimetre, which is where the millilitre and the cubic centimetre meet.
How many decimetres are in a kilometer?
One kilometer is 10000 decimetres, exactly. Going the other way, one decimetre is 1.0000 × 10^-4 kilometers. Both figures come from the same defined relation rather than from a measurement, which is why they are the same today as they were in 1959.
Every length unit here
The whole group — 13 units with their symbols and the size of each one in meters — is on the conversion index, along with every pair it makes. The table above already gives each of them relative to a kilometer.
Source: NIST — international yard and pound agreement (inch = 25.4 mm exactly)
Cite this page
- APA
- Rule Calculator. (2026). Convert Kilometers to decimetres. Rule Calculator. https://rulecalculators.com/convert/kilometer-to-decimeter
- MLA
- "Convert Kilometers to decimetres." Rule Calculator, August 16, 2026, https://rulecalculators.com/convert/kilometer-to-decimeter.
- Chicago
- Rule Calculator. "Convert Kilometers to decimetres." Rule Calculator. Last reviewed August 16, 2026. https://rulecalculators.com/convert/kilometer-to-decimeter.
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Questions people actually ask
- How many decimetres are in a kilometer?
- 10000. A tenth of a metre. Rare in speech and unavoidable in definitions: the litre is a cubic decimetre, which is where the millilitre and the cubic centimetre meet.
- How do I convert decimetres back to kilometers?
- Divide by 10000, or multiply by 1.0000 × 10^-4 — they are the same operation.
Other length conversions
Decimetres to kilometers — the same conversion the other way.