Megameter is 1000000 meter units.
Megameters to Exameters Converter — Mm to Em
Convert Megameter (Mm) to Exameter (Em) using the exact conversion factor (1 megameter = 1e-12 exameter). See the formula, worked examples, and conversion table.
Megameters to Exameters converter
Converter
Length Converter
Convert SI, imperial, US customary, astronomical, scientific, and historical length units.
Context values
Some unit families need one extra value for a physically accurate result.
Exameter is 1000000000000000000 meter units.
Result = input x 1e+6 / 1e+18.
Length uses the meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Megameters to Exameters
Megameter and Exameter both measure length. Specifically: Megameter is 1000000 meter units, and exameter is 1000000000000000000 meter units.
Formula
exameters = megameters × 1e-12
This factor comes from each unit's defined relationship to the category's base unit: 1 megameter equals 1000000 base units, and 1 exameter equals 1e+18 base units, so dividing one by the other gives the direct megameter-to-exameter factor of 1e-12.
Simple example
1 Mm × 1e-12 = 1e-12 Em
1 megameter = 1e-12 exameters.
Real-world example
10 Mm × 1e-12 = 1e-11 Em
10 megameters = 1e-11 exameters.
Conversion table
| Megameter (Mm) | Exameter (Em) |
|---|---|
| 1 Mm | 1e-12 Em |
| 5 Mm | 5e-12 Em |
| 10 Mm | 1e-11 Em |
| 21.0975 Mm | 2.10975e-11 Em |
| 42.195 Mm | 4.2195e-11 Em |
| 100 Mm | 1e-10 Em |
Reverse conversion: Exameter to Megameter
1e-12 Em × 1e+12 = 1 Mm
1e-12 exameters = 1 megameter.
megameters = exameters × 1e+12
For a page dedicated to this direction, see Exameter to Megameter.
Understanding the Megameter (Mm)
Megameter is 1000000 meter units.
Understanding the Exameter (Em)
Exameter is 1000000000000000000 meter units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many exameters are in 1 megameter?
1 megameter equals 1e-12 exameters, using the exact defined conversion factor rather than an estimate.
How do I convert megameter to exameter?
Multiply the megameter value by 1e-12. The converter above does this instantly to whatever precision you set.
How do I convert exameter back to megameter?
Use the reverse factor: 1 exameter equals 1e+12 megameters. You can also use the swap control in the converter above to flip the direction instantly.
What is a megameter?
Megameter (Mm) is a unit of length.
What is a exameter?
Exameter (Em) is a unit of length.
Is the megameter to exameter conversion exact?
Yes. Both megameter and exameter are defined by fixed standards rather than physical artifacts, so the factor of 1e-12 used above is exact to as many digits as you choose to display.