Attonewton is 1e-18 newton units.
Attonewtons to Femtonewtons Converter — aN to fN
Convert Attonewton (aN) to Femtonewton (fN) using the exact conversion factor (1 attonewton = 0.001 femtonewton). See the formula, worked examples, and conversion table.
Attonewtons to Femtonewtons converter
Converter
Engineering Converter
Convert common stress, force, torque, power, and energy units used in engineering.
Context values
Some unit families need one extra value for a physically accurate result.
Femtonewton is 1e-15 newton units.
Result = input x 1e-18 / 1e-15.
Force units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Attonewtons to Femtonewtons
Attonewton and Femtonewton both measure a quantity used in structural or mechanical engineering — commonly stress, pressure, force, torque, power, or energy — where converting between the unit conventions used in different regions, industries, or equipment specifications is a routine part of design work. Specifically: Attonewton is 1e-18 newton units, and femtonewton is 1e-15 newton units.
Formula
femtonewtons = attonewtons × 0.001
This factor comes from each unit's defined relationship to the category's base unit: 1 attonewton equals 1e-18 base units, and 1 femtonewton equals 1e-15 base units, so dividing one by the other gives the direct attonewton-to-femtonewton factor of 0.001.
Simple example
1 aN × 0.001 = 0.001 fN
1 attonewton = 0.001 femtonewtons.
Real-world example
100 aN × 0.001 = 0.1 fN
100 attonewtons = 0.1 femtonewtons.
Conversion table
| Attonewton (aN) | Femtonewton (fN) |
|---|---|
| 1 aN | 0.001 fN |
| 10 aN | 0.01 fN |
| 50 aN | 0.05 fN |
| 100 aN | 0.1 fN |
| 500 aN | 0.5 fN |
| 1,000 aN | 1 fN |
Reverse conversion: Femtonewton to Attonewton
0.001 fN × 1000 = 1 aN
0.001 femtonewtons = 1 attonewton.
attonewtons = femtonewtons × 1000
For a page dedicated to this direction, see Femtonewton to Attonewton.
Understanding the Attonewton (aN)
Attonewton is 1e-18 newton units.
Understanding the Femtonewton (fN)
Femtonewton is 1e-15 newton units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many femtonewtons are in 1 attonewton?
1 attonewton equals 0.001 femtonewtons, using the exact defined conversion factor rather than an estimate.
How do I convert attonewton to femtonewton?
Multiply the attonewton value by 0.001. The converter above does this instantly to whatever precision you set.
How do I convert femtonewton back to attonewton?
Use the reverse factor: 1 femtonewton equals 1,000 attonewtons. You can also use the swap control in the converter above to flip the direction instantly.
What is a attonewton?
Attonewton (aN) is a unit of engineering.
What is a femtonewton?
Femtonewton (fN) is a unit of engineering.
Is the attonewton to femtonewton conversion exact?
Yes. Both attonewton and femtonewton are defined by fixed standards rather than physical artifacts, so the factor of 0.001 used above is exact to as many digits as you choose to display.
Why do engineering unit conventions vary so much by region and industry?
Pressure, force, and stress can be expressed in metric (pascal, newton), US customary (psi, pound-force), or older and industry-specific units (atmosphere, torr, kip) depending on the country, industry, and even the equipment manufacturer, which is why engineers routinely need to convert between them when working across specs from different sources.