Nanometer is 1e-9 meter units.
Nanometers to Femtometers Converter — nm to fm
Convert Nanometer (nm) to Femtometer (fm) using the exact conversion factor (1 nanometer = 1,000,000 femtometer). See the formula, worked examples, and conversion table.
Nanometers to Femtometers 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.
Femtometer is 1e-15 meter units.
Result = input x 1e-9 / 1e-15.
Length uses the meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Nanometers to Femtometers
Nanometer and Femtometer both measure length. Specifically: Nanometer is 1e-9 meter units, and femtometer is 1e-15 meter units.
Formula
femtometers = nanometers × 1000000
This factor comes from each unit's defined relationship to the category's base unit: 1 nanometer equals 1e-9 base units, and 1 femtometer equals 1e-15 base units, so dividing one by the other gives the direct nanometer-to-femtometer factor of 1000000.
Simple example
1 nm × 1000000 = 1,000,000 fm
1 nanometer = 1,000,000 femtometers.
Real-world example
10 nm × 1000000 = 10,000,000 fm
10 nanometers = 10,000,000 femtometers.
Conversion table
| Nanometer (nm) | Femtometer (fm) |
|---|---|
| 1 nm | 1,000,000 fm |
| 5 nm | 5,000,000 fm |
| 10 nm | 10,000,000 fm |
| 21.0975 nm | 21,097,500 fm |
| 42.195 nm | 42,195,000 fm |
| 100 nm | 100,000,000 fm |
Reverse conversion: Femtometer to Nanometer
1 fm × 0.000001 = 0.000001 nm
1 femtometer = 0.000001 nanometers.
nanometers = femtometers × 0.000001
For a page dedicated to this direction, see Femtometer to Nanometer.
Understanding the Nanometer (nm)
Nanometer is 1e-9 meter units.
Understanding the Femtometer (fm)
Femtometer is 1e-15 meter units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many femtometers are in 1 nanometer?
1 nanometer equals 1,000,000 femtometers, using the exact defined conversion factor rather than an estimate.
How do I convert nanometer to femtometer?
Multiply the nanometer value by 1000000. The converter above does this instantly to whatever precision you set.
How do I convert femtometer back to nanometer?
Use the reverse factor: 1 femtometer equals 0.000001 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 femtometer?
Femtometer (fm) is a unit of length.
Is the nanometer to femtometer conversion exact?
Yes. Both nanometer and femtometer are defined by fixed standards rather than physical artifacts, so the factor of 1000000 used above is exact to as many digits as you choose to display.