Gigameter is 1000000000 meter units.
Gigameters to Nanometers Converter — Gm to nm
Convert Gigameter (Gm) to Nanometer (nm) using the exact conversion factor (1 gigameter = 1e+18 nanometer). See the formula, worked examples, and conversion table.
Gigameters to Nanometers 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.
Nanometer is 1e-9 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 Gigameters to Nanometers
Gigameter and Nanometer both measure length. Specifically: Gigameter is 1000000000 meter units, and nanometer is 1e-9 meter units.
Formula
nanometers = gigameters × 1e+18
This factor comes from each unit's defined relationship to the category's base unit: 1 gigameter equals 1000000000 base units, and 1 nanometer equals 1e-9 base units, so dividing one by the other gives the direct gigameter-to-nanometer factor of 1e+18.
Simple example
1 Gm × 1e+18 = 1e+18 nm
1 gigameter = 1e+18 nanometers.
Real-world example
10 Gm × 1e+18 = 1e+19 nm
10 gigameters = 1e+19 nanometers.
Conversion table
| Gigameter (Gm) | Nanometer (nm) |
|---|---|
| 1 Gm | 1e+18 nm |
| 5 Gm | 5e+18 nm |
| 10 Gm | 1e+19 nm |
| 21.0975 Gm | 2.10975e+19 nm |
| 42.195 Gm | 4.2195e+19 nm |
| 100 Gm | 1e+20 nm |
Reverse conversion: Nanometer to Gigameter
1e+18 nm × 1e-18 = 1 Gm
1e+18 nanometers = 1 gigameters.
gigameters = nanometers × 1e-18
For a page dedicated to this direction, see Nanometer to Gigameter.
Understanding the Gigameter (Gm)
Gigameter is 1000000000 meter units.
Understanding the Nanometer (nm)
Nanometer is 1e-9 meter units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many nanometers are in 1 gigameter?
1 gigameter equals 1e+18 nanometers, using the exact defined conversion factor rather than an estimate.
How do I convert gigameter to nanometer?
Multiply the gigameter value by 1e+18. The converter above does this instantly to whatever precision you set.
How do I convert nanometer back to gigameter?
Use the reverse factor: 1 nanometer equals 1e-18 gigameters. You can also use the swap control in the converter above to flip the direction instantly.
What is a gigameter?
Gigameter (Gm) is a unit of length.
What is a nanometer?
Nanometer (nm) is a unit of length.
Is the gigameter to nanometer conversion exact?
Yes. Both gigameter and nanometer 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.