Convert Kilometer to Hectometer
Convert kilometers to hectometers instantly. 1 kilometer = 10 hectometer — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Hectometer to Kilometer converter for the reverse conversion.
Units explained
Kilometer
A kilometer is a metric unit of length equal to one thousand meters. It is the standard unit for measuring road distances, geographic distances, and other large-scale measurements in metric countries.
The kilometer was defined alongside the meter in 1795 using the standard SI prefix kilo- (from Greek chilioi, "thousand"), denoting one thousand units.
Kilometers are used worldwide (except the United States and a few others) for road signage, geographic distance, athletic events, and scientific distances at planetary scale. Speed limits in most countries are given in km/h.
Adopted 1795 in France as part of the original metric system; the kilometer became the global standard for road and geographic distance through the 19th and 20th century metric adoption.
Hectometer
A hectometer is a metric unit of length equal to one hundred meters (100 m). It is occasionally used in sports, agricultural surveying, and some European real-estate contexts.
The hectometer was defined alongside the meter when France adopted the metric system in 1795, using the SI prefix hecto- (from Greek hekaton, hundred) to denote multiplication by 100.
Hectometers appear in some sports contexts (the 100 m sprint is technically 1 hm), in agriculture (parcel sizes in some European nations), and in atmospheric science. Most contexts now use meters or kilometers instead.
Adopted in 1795 in France; ratified through the Metre Convention of 1875; remains a defined SI prefix unit although rarely used outside specialised contexts.
Kilometer to Hectometer conversion formula
The relationship between kilometers and hectometers:
To convert kilometers to hectometers, multiply the value in kilometers by 10. To reverse, multiply hectometers by 0.1.
How to use this converter
Type a value into the calculator. The result in hectometers updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Hectometer to Kilometer converter for the reverse direction.
Step-by-step: convert kilometers to hectometers
- Write down the value in kilometers (km).
- Multiply that value by the factor 10.
- The product is the equivalent value in hectometers (hm).
- To reverse, multiply the hectometer value by 0.1.
Worked examples
Example 1 — Convert 1 km to hm:
1 × 10 = 10 hm
Example 2 — Convert 100 km to hm:
100 × 10 = 1000 hm
Real-world example — Road-sign distances across systems
A 100-kilometer road sign converts cleanly into hectometers — exactly the conversion drivers planning trips abroad rely on when reading road signs in a different measurement system.
100 km × 10 = 1000 hm
Real-world example — Endurance race distances
A 50-kilometer cycling or running race converts to a recognizable distance in hectometers. Endurance athletes coming from a different measurement system use this conversion to compare training plans across regions.
50 km × 10 = 500 hm
Real-world example — Maritime exclusion zone
A 200-kilometer exclusion zone (a common maritime boundary) converts to a different value in hectometers that's useful when describing the same zone in everyday land-distance units.
200 km × 10 = 2000 hm
Kilometer to Hectometer conversion table
Standard reference values for converting kilometers to hectometers:
| Kilometer [km] | Hectometer [hm] |
|---|---|
| 0.01 | 0.1 |
| 0.1 | 1 |
| 1 | 10 |
| 2 | 20 |
| 3 | 30 |
| 4 | 40 |
| 5 | 50 |
| 10 | 100 |
| 20 | 200 |
| 30 | 300 |
| 40 | 400 |
| 50 | 500 |
| 100 | 1000 |
| 500 | 5000 |
| 1000 | 10000 |
Frequently asked questions
How many hectometers is 1 kilometer?
How do I convert kilometers to hectometers?
How do I convert hectometers back to kilometers?
How many hectometers is 100 kilometers?
Popular length unit conversions
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Metric / SI (17 units)
Imperial / US Customary (27 units)
Nautical (1 units)
Astronomical (9 units)
Atomic / Physics (6 units)
Typographic (3 units)
Sources & references
Conversion factor (1 km = 10 hm) verified against the following authoritative sources:
- BIPM — The International System of Units (SI Brochure 9th ed.)
Official BIPM publication defining the seven SI base units (including the meter) and the rules for their use. The global authority on units of measurement.
- NIST — Guide to the SI
US National Institute of Standards and Technology reference covering the SI base and derived units with definitions and usage rules for US technical practice.
- NIST Special Publication 811 — Guide for the Use of the International System of Units
Detailed NIST guide covering exact conversion factors between SI and US customary units along with formatting and rounding conventions.
- NIST — Refinement of values for the yard and pound (Federal Register 1959)
The treaty (signed by US
- International Hydrographic Organization — Resolution on the Nautical Mile
International authority that standardised the nautical mile at exactly 1852 m in 1929 — the value adopted worldwide for sea and air navigation.