Convert Hectometer to Terameter
Convert hectometers to terameters instantly. 1 hectometer = 1e-10 terameter — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Terameter 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.
Terameter
A terameter is a metric unit of length equal to one trillion meters (1×10¹² m). It is rare in everyday use but appears in astronomy when expressing solar-system-scale distances in SI units.
The terameter uses the SI prefix tera- (from Greek teras, monster), adopted by the CGPM in 1960 to denote multiplication by one trillion (10¹²).
Terameters are occasionally used in astronomy to express distances on the order of Earth–Sun (~0.15 Tm or 1 AU) and outer-planet distances. The astronomical unit (AU) and light-hour are more common in practice.
SI prefix tera- adopted in 1960; the terameter is the standard SI prefix unit for distances comparable to inter-planetary scales but is less common than the AU in working astronomy.
Hectometer to Terameter conversion formula
The relationship between hectometers and terameters:
To convert hectometers to terameters, multiply the value in hectometers by 1e-10. To reverse, multiply terameters by 1e+10.
How to use this converter
Type a value into the calculator. The result in terameters updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Terameter to Hectometer converter for the reverse direction.
Step-by-step: convert hectometers to terameters
- Write down the value in hectometers (hm).
- Multiply that value by the factor 1e-10.
- The product is the equivalent value in terameters (Tm).
- To reverse, multiply the terameter value by 1e+10.
Worked examples
Example 1 — Convert 1 hm to Tm:
1 × 1e-10 = 1e-10 Tm
Example 2 — Convert 100 hm to Tm:
100 × 1e-10 = 1e-8 Tm
Hectometer to Terameter conversion table
Standard reference values for converting hectometers to terameters:
| Hectometer [hm] | Terameter [Tm] |
|---|---|
| 0.01 | 1e-12 |
| 0.1 | 1e-11 |
| 1 | 1e-10 |
| 2 | 2e-10 |
| 3 | 3e-10 |
| 4 | 4e-10 |
| 5 | 5e-10 |
| 10 | 1e-9 |
| 20 | 2e-9 |
| 30 | 3e-9 |
| 40 | 4e-9 |
| 50 | 5e-9 |
| 100 | 1e-8 |
| 500 | 5e-8 |
| 1000 | 1e-7 |
Frequently asked questions
How many terameters is 1 hectometer?
How do I convert hectometers to terameters?
How do I convert terameters back to hectometers?
How many terameters is 100 hectometers?
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Sources & references
Conversion factor (1 hm = 1e-10 Tm) 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.