Decimeter is 0.1 meter units.
Decimeters to Gigameters Converter — dm to Gm
Convert Decimeter (dm) to Gigameter (Gm) using the exact conversion factor (1 decimeter = 1e-10 gigameter). See the formula, worked examples, and conversion table.
Decimeters to Gigameters 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.
Gigameter is 1000000000 meter units.
Result = input x 0.1 / 1e+9.
Length uses the meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Decimeters to Gigameters
Decimeter and Gigameter both measure length. Specifically: Decimeter is 0.1 meter units, and gigameter is 1000000000 meter units.
Formula
gigameters = decimeters × 1e-10
This factor comes from each unit's defined relationship to the category's base unit: 1 decimeter equals 0.1 base units, and 1 gigameter equals 1000000000 base units, so dividing one by the other gives the direct decimeter-to-gigameter factor of 1e-10.
Simple example
1 dm × 1e-10 = 1e-10 Gm
1 decimeter = 1e-10 gigameters.
Real-world example
10 dm × 1e-10 = 1e-9 Gm
10 decimeters = 1e-9 gigameters.
Conversion table
| Decimeter (dm) | Gigameter (Gm) |
|---|---|
| 1 dm | 1e-10 Gm |
| 5 dm | 5e-10 Gm |
| 10 dm | 1e-9 Gm |
| 21.0975 dm | 2.10975e-9 Gm |
| 42.195 dm | 4.2195e-9 Gm |
| 100 dm | 1e-8 Gm |
Reverse conversion: Gigameter to Decimeter
1e-10 Gm × 10000000000 = 1 dm
1e-10 gigameters = 1 decimeter.
decimeters = gigameters × 10000000000
For a page dedicated to this direction, see Gigameter to Decimeter.
Understanding the Decimeter (dm)
Decimeter is 0.1 meter units.
Understanding the Gigameter (Gm)
Gigameter is 1000000000 meter units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many gigameters are in 1 decimeter?
1 decimeter equals 1e-10 gigameters, using the exact defined conversion factor rather than an estimate.
How do I convert decimeter to gigameter?
Multiply the decimeter value by 1e-10. The converter above does this instantly to whatever precision you set.
How do I convert gigameter back to decimeter?
Use the reverse factor: 1 gigameter equals 10,000,000,000 decimeters. You can also use the swap control in the converter above to flip the direction instantly.
What is a decimeter?
Decimeter (dm) is a unit of length.
What is a gigameter?
Gigameter (Gm) is a unit of length.
Is the decimeter to gigameter conversion exact?
Yes. Both decimeter and gigameter are defined by fixed standards rather than physical artifacts, so the factor of 1e-10 used above is exact to as many digits as you choose to display.