Convert Hectometer to Megameter
Convert hectometers to megameters instantly. 1 hectometer = 0.0001 megameter — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Megameter to Hectometer converter for the reverse conversion.
Units explained
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.
Megameter
A megameter is a metric unit of length equal to one million meters (1×10⁶ m, or 1,000 km). It is occasionally used in geophysics and astronomy when expressing planetary-scale distances in SI units.
The megameter uses the SI prefix mega- (from Greek megas, great), adopted by the CGPM in 1960 to denote multiplication by one million.
Megameters appear in geophysics (Earth's mean radius is 6.371 Mm), planetary science, and large-scale civil engineering planning. The unit is less common than the kilometer for everyday geographic distances.
SI prefix mega- adopted in 1960; the megameter is the standard SI prefix unit for distances comparable to planetary radii.
Hectometer to Megameter conversion formula
The relationship between hectometers and megameters:
To convert hectometers to megameters, multiply the value in hectometers by 0.0001. To reverse, multiply megameters by 10000.
How to use this converter
Type a value into the calculator. The result in megameters updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Megameter to Hectometer converter for the reverse direction.
Step-by-step: convert hectometers to megameters
- Write down the value in hectometers (hm).
- Multiply that value by the factor 0.0001.
- The product is the equivalent value in megameters (Mm).
- To reverse, multiply the megameter value by 10000.
Worked examples
Example 1 — Convert 1 hm to Mm:
1 × 0.0001 = 0.0001 Mm
Example 2 — Convert 100 hm to Mm:
100 × 0.0001 = 0.01 Mm
Hectometer to Megameter conversion table
Standard reference values for converting hectometers to megameters:
| Hectometer [hm] | Megameter [Mm] |
|---|---|
| 0.01 | 1e-6 |
| 0.1 | 1e-5 |
| 1 | 0.0001 |
| 2 | 0.0002 |
| 3 | 0.0003 |
| 4 | 0.0004 |
| 5 | 0.0005 |
| 10 | 0.001 |
| 20 | 0.002 |
| 30 | 0.003 |
| 40 | 0.004 |
| 50 | 0.005 |
| 100 | 0.01 |
| 500 | 0.05 |
| 1000 | 0.1 |
Frequently asked questions
How many megameters is 1 hectometer?
How do I convert hectometers to megameters?
How do I convert megameters back to hectometers?
How many megameters is 100 hectometers?
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Sources & references
Conversion factor (1 hm = 0.0001 Mm) 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.