Nanometer is 1e-9 meter units.
Nanometers to Gigameters Converter — nm to Gm
Convert Nanometer (nm) to Gigameter (Gm) using the exact conversion factor (1 nanometer = 1e-18 gigameter). See the formula, worked examples, and conversion table.
Nanometers 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 1e-9 / 1e+9.
Length uses the meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Nanometers to Gigameters
Nanometer and Gigameter both measure length. Specifically: Nanometer is 1e-9 meter units, and gigameter is 1000000000 meter units.
Formula
gigameters = nanometers × 1e-18
This factor comes from each unit's defined relationship to the category's base unit: 1 nanometer equals 1e-9 base units, and 1 gigameter equals 1000000000 base units, so dividing one by the other gives the direct nanometer-to-gigameter factor of 1e-18.
Simple example
1 nm × 1e-18 = 1e-18 Gm
1 nanometer = 1e-18 gigameters.
Real-world example
10 nm × 1e-18 = 1e-17 Gm
10 nanometers = 1e-17 gigameters.
Conversion table
| Nanometer (nm) | Gigameter (Gm) |
|---|---|
| 1 nm | 1e-18 Gm |
| 5 nm | 5e-18 Gm |
| 10 nm | 1e-17 Gm |
| 21.0975 nm | 2.10975e-17 Gm |
| 42.195 nm | 4.2195e-17 Gm |
| 100 nm | 1e-16 Gm |
Reverse conversion: Gigameter to Nanometer
1e-18 Gm × 1e+18 = 1 nm
1e-18 gigameters = 1 nanometer.
nanometers = gigameters × 1e+18
For a page dedicated to this direction, see Gigameter to Nanometer.
Understanding the Nanometer (nm)
Nanometer is 1e-9 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 nanometer?
1 nanometer equals 1e-18 gigameters, using the exact defined conversion factor rather than an estimate.
How do I convert nanometer to gigameter?
Multiply the nanometer value by 1e-18. The converter above does this instantly to whatever precision you set.
How do I convert gigameter back to nanometer?
Use the reverse factor: 1 gigameter equals 1e+18 nanometers. You can also use the swap control in the converter above to flip the direction instantly.
What is a nanometer?
Nanometer (nm) is a unit of length.
What is a gigameter?
Gigameter (Gm) is a unit of length.
Is the nanometer to gigameter conversion exact?
Yes. Both nanometer and gigameter are defined by fixed standards rather than physical artifacts, so the factor of 1e-18 used above is exact to as many digits as you choose to display.