Femtonewton is 1e-15 newton units.
Femtonewtons to Attonewtons Converter — fN to aN
Convert Femtonewton (fN) to Attonewton (aN) using the exact conversion factor (1 femtonewton = 1,000 attonewton). See the formula, worked examples, and conversion table.
Femtonewtons to Attonewtons 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.
Attonewton is 1e-18 newton units.
Result = input x 1e-15 / 1e-18.
Force units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Femtonewtons to Attonewtons
Femtonewton and Attonewton 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: Femtonewton is 1e-15 newton units, and attonewton is 1e-18 newton units.
Formula
attonewtons = femtonewtons × 1000
This factor comes from each unit's defined relationship to the category's base unit: 1 femtonewton equals 1e-15 base units, and 1 attonewton equals 1e-18 base units, so dividing one by the other gives the direct femtonewton-to-attonewton factor of 1000.
Simple example
1 fN × 1000 = 1,000 aN
1 femtonewton = 1,000 attonewtons.
Real-world example
100 fN × 1000 = 100,000 aN
100 femtonewtons = 100,000 attonewtons.
Conversion table
| Femtonewton (fN) | Attonewton (aN) |
|---|---|
| 1 fN | 1,000 aN |
| 10 fN | 10,000 aN |
| 50 fN | 50,000 aN |
| 100 fN | 100,000 aN |
| 500 fN | 500,000 aN |
| 1,000 fN | 1,000,000 aN |
Reverse conversion: Attonewton to Femtonewton
1 aN × 0.001 = 0.001 fN
1 attonewton = 0.001 femtonewtons.
femtonewtons = attonewtons × 0.001
For a page dedicated to this direction, see Attonewton to Femtonewton.
Understanding the Femtonewton (fN)
Femtonewton is 1e-15 newton units.
Understanding the Attonewton (aN)
Attonewton is 1e-18 newton units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many attonewtons are in 1 femtonewton?
1 femtonewton equals 1,000 attonewtons, using the exact defined conversion factor rather than an estimate.
How do I convert femtonewton to attonewton?
Multiply the femtonewton value by 1000. The converter above does this instantly to whatever precision you set.
How do I convert attonewton back to femtonewton?
Use the reverse factor: 1 attonewton equals 0.001 femtonewtons. You can also use the swap control in the converter above to flip the direction instantly.
What is a femtonewton?
Femtonewton (fN) is a unit of engineering.
What is a attonewton?
Attonewton (aN) is a unit of engineering.
Is the femtonewton to attonewton conversion exact?
Yes. Both femtonewton and attonewton are defined by fixed standards rather than physical artifacts, so the factor of 1000 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.