Femtometer is 1e-15 meter units.
Femtometers to Nanometers Converter — fm to nm
Convert Femtometer (fm) to Nanometer (nm) using the exact conversion factor (1 femtometer = 0.000001 nanometer). See the formula, worked examples, and conversion table.
Femtometers 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-15 / 1e-9.
Length uses the meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Femtometers to Nanometers
Femtometer and Nanometer both measure length. Specifically: Femtometer is 1e-15 meter units, and nanometer is 1e-9 meter units.
Formula
nanometers = femtometers × 0.000001
This factor comes from each unit's defined relationship to the category's base unit: 1 femtometer equals 1e-15 base units, and 1 nanometer equals 1e-9 base units, so dividing one by the other gives the direct femtometer-to-nanometer factor of 0.000001.
Simple example
1 fm × 0.000001 = 0.000001 nm
1 femtometer = 0.000001 nanometers.
Real-world example
10 fm × 0.000001 = 0.00001 nm
10 femtometers = 0.00001 nanometers.
Conversion table
| Femtometer (fm) | Nanometer (nm) |
|---|---|
| 1 fm | 0.000001 nm |
| 5 fm | 0.000005 nm |
| 10 fm | 0.00001 nm |
| 21.0975 fm | 0.0000210975 nm |
| 42.195 fm | 0.000042195 nm |
| 100 fm | 0.0001 nm |
Reverse conversion: Nanometer to Femtometer
0.000001 nm × 1000000 = 1 fm
0.000001 nanometers = 1 femtometer.
femtometers = nanometers × 1000000
For a page dedicated to this direction, see Nanometer to Femtometer.
Understanding the Femtometer (fm)
Femtometer is 1e-15 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 femtometer?
1 femtometer equals 0.000001 nanometers, using the exact defined conversion factor rather than an estimate.
How do I convert femtometer to nanometer?
Multiply the femtometer value by 0.000001. The converter above does this instantly to whatever precision you set.
How do I convert nanometer back to femtometer?
Use the reverse factor: 1 nanometer equals 1,000,000 femtometers. You can also use the swap control in the converter above to flip the direction instantly.
What is a femtometer?
Femtometer (fm) is a unit of length.
What is a nanometer?
Nanometer (nm) is a unit of length.
Is the femtometer to nanometer conversion exact?
Yes. Both femtometer and nanometer are defined by fixed standards rather than physical artifacts, so the factor of 0.000001 used above is exact to as many digits as you choose to display.