Also available in our
Android app, with charts and full breakdown tables.
Rate this calculator
Was it useful? A quick star rating helps others — and you can leave a comment too.
Rate it:
★
★
★
★
★
⚡ Decimeters to Megameters: the quick answer
1 dm = 1 × 10⁻⁷ Mm
1 decimeter equals 1 × 10⁻⁷ megameters
To convert decimeters to megameters, multiply the value by 1 × 10⁻⁷.
To go the other way, multiply megameters by 10,000,000 to get decimeters.
↔ Convert megameters to decimeters instead
🧮 Formula
Every unit here is defined by its length in meters, so the conversion factor is (meters per decimeter) ÷ (meters per megameter).
📊 Decimeters to Megameters conversion table
✏️ Worked examples
📘 About these units
Decimeter (dm). A decimeter is one tenth of a meter (10 centimeters), used mostly in schools and some sciences.
Megameter (Mm). A megameter is 1,000 kilometers, a convenient scale for planetary and continental distances.
❓ Frequently asked questions
How many megameters are in one decimeter?
There are 1 × 10⁻⁷ megameters in one decimeter.
How do I convert decimeters to megameters?
Multiply the number of decimeters by 1 × 10⁻⁷. For example, 10 decimeters equal 1 × 10⁻⁶ megameters.
How many decimeters are in one megameter?
One megameter equals 10,000,000 decimeters.
🔗 More length conversions
All length units →
What people are saying
★★★★★
Anonymous · 02 Oct 2026
★★★★★
Anonymous · 01 Oct 2026
★★★★★
Anonymous · 28 Sep 2026