Convert Terameter to Exameter
Convert terameters to exameters instantly. 1 terameter = 1e-6 exameter — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Exameter to Terameter converter for the reverse conversion.
Units explained
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.
Exameter
An exameter is a metric unit of length equal to one quintillion meters (1×10¹⁸ m). It is among the largest defined SI prefix units of length and appears almost exclusively in astrophysical contexts.
The exameter uses the SI prefix exa- (from Greek hex, six, related to the exponent's powers-of-thousand grouping), adopted by the CGPM in 1975 to denote 10¹⁸.
Exameters could be used to express galactic-scale distances. One kiloparsec is approximately 30.9 Em. Astronomy generally uses parsecs, kiloparsecs, and megaparsecs instead.
SI prefix exa- adopted in 1975; the exameter has very limited practical use because galactic-scale astronomy has its own well-established unit system.
Terameter to Exameter conversion formula
The relationship between terameters and exameters:
To convert terameters to exameters, multiply the value in terameters by 1e-6. To reverse, multiply exameters by 1000000.
How to use this converter
Type a value into the calculator. The result in exameters updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Exameter to Terameter converter for the reverse direction.
Step-by-step: convert terameters to exameters
- Write down the value in terameters (Tm).
- Multiply that value by the factor 1e-6.
- The product is the equivalent value in exameters (Em).
- To reverse, multiply the exameter value by 1000000.
Worked examples
Example 1 — Convert 1 Tm to Em:
1 × 1e-6 = 1e-6 Em
Example 2 — Convert 100 Tm to Em:
100 × 1e-6 = 1e-4 Em
Terameter to Exameter conversion table
Standard reference values for converting terameters to exameters:
| Terameter [Tm] | Exameter [Em] |
|---|---|
| 0.01 | 1e-8 |
| 0.1 | 1e-7 |
| 1 | 1e-6 |
| 2 | 2e-6 |
| 3 | 3e-6 |
| 4 | 4e-6 |
| 5 | 5e-6 |
| 10 | 1e-5 |
| 20 | 2e-5 |
| 30 | 3e-5 |
| 40 | 4e-5 |
| 50 | 5e-5 |
| 100 | 1e-4 |
| 500 | 0.0005 |
| 1000 | 0.001 |
Frequently asked questions
How many exameters is 1 terameter?
How do I convert terameters to exameters?
How do I convert exameters back to terameters?
How many exameters is 100 terameters?
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Sources & references
Conversion factor (1 Tm = 1e-6 Em) 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.