Megameter is 1000000 meter units.
Megameters to Petameters Converter — Mm to Pm
Convert Megameter (Mm) to Petameter (Pm) using the exact conversion factor (1 megameter = 1e-9 petameter). See the formula, worked examples, and conversion table.
Megameters to Petameters 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.
Petameter is 1000000000000000 meter units.
Result = input x 1e+6 / 1e+15.
Length uses the meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Megameters to Petameters
Megameter and Petameter both measure length. Specifically: Megameter is 1000000 meter units, and petameter is 1000000000000000 meter units.
Formula
petameters = megameters × 1e-9
This factor comes from each unit's defined relationship to the category's base unit: 1 megameter equals 1000000 base units, and 1 petameter equals 1e+15 base units, so dividing one by the other gives the direct megameter-to-petameter factor of 1e-9.
Simple example
1 Mm × 1e-9 = 1e-9 Pm
1 megameter = 1e-9 petameters.
Real-world example
10 Mm × 1e-9 = 1e-8 Pm
10 megameters = 1e-8 petameters.
Conversion table
| Megameter (Mm) | Petameter (Pm) |
|---|---|
| 1 Mm | 1e-9 Pm |
| 5 Mm | 5e-9 Pm |
| 10 Mm | 1e-8 Pm |
| 21.0975 Mm | 2.10975e-8 Pm |
| 42.195 Mm | 4.2195e-8 Pm |
| 100 Mm | 1e-7 Pm |
Reverse conversion: Petameter to Megameter
1e-9 Pm × 1000000000 = 1 Mm
1e-9 petameters = 1 megameters.
megameters = petameters × 1000000000
For a page dedicated to this direction, see Petameter to Megameter.
Understanding the Megameter (Mm)
Megameter is 1000000 meter units.
Understanding the Petameter (Pm)
Petameter is 1000000000000000 meter units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many petameters are in 1 megameter?
1 megameter equals 1e-9 petameters, using the exact defined conversion factor rather than an estimate.
How do I convert megameter to petameter?
Multiply the megameter value by 1e-9. The converter above does this instantly to whatever precision you set.
How do I convert petameter back to megameter?
Use the reverse factor: 1 petameter equals 1,000,000,000 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 petameter?
Petameter (Pm) is a unit of length.
Is the megameter to petameter conversion exact?
Yes. Both megameter and petameter are defined by fixed standards rather than physical artifacts, so the factor of 1e-9 used above is exact to as many digits as you choose to display.