Convert Megameter to Hectometer
Convert megameters to hectometers instantly. 1 megameter = 10000 hectometer — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Hectometer to Megameter converter for the reverse conversion.
Units explained
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
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 to Hectometer conversion formula
The relationship between megameters and hectometers:
To convert megameters to hectometers, multiply the value in megameters by 10000. To reverse, multiply hectometers by 0.0001.
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 Megameter converter for the reverse direction.
Step-by-step: convert megameters to hectometers
- Write down the value in megameters (Mm).
- Multiply that value by the factor 10000.
- The product is the equivalent value in hectometers (hm).
- To reverse, multiply the hectometer value by 0.0001.
Worked examples
Example 1 — Convert 1 Mm to hm:
1 × 10000 = 10000 hm
Example 2 — Convert 100 Mm to hm:
100 × 10000 = 1000000 hm
Megameter to Hectometer conversion table
Standard reference values for converting megameters to hectometers:
| Megameter [Mm] | Hectometer [hm] |
|---|---|
| 0.01 | 100 |
| 0.1 | 1000 |
| 1 | 10000 |
| 2 | 20000 |
| 3 | 30000 |
| 4 | 40000 |
| 5 | 50000 |
| 10 | 100000 |
| 20 | 200000 |
| 30 | 300000 |
| 40 | 400000 |
| 50 | 500000 |
| 100 | 1000000 |
| 500 | 5000000 |
| 1000 | 1e+7 |
Frequently asked questions
How many hectometers is 1 megameter?
How do I convert megameters to hectometers?
How do I convert hectometers back to megameters?
How many hectometers is 100 megameters?
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Sources & references
Conversion factor (1 Mm = 10000 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 Astronomical Union — System of Astronomical Constants
The IAU defines astronomical units including the AU (149597870700 m exactly) light-year and parsec used in astronomy and astrophysics.