Zettanewton is 1e+21 newton units.
Zettanewtons to Femtonewtons Converter — ZN to fN
Convert Zettanewton (ZN) to Femtonewton (fN) using the exact conversion factor (1 zettanewton = 1e+36 femtonewton). See the formula, worked examples, and conversion table.
Zettanewtons to Femtonewtons converter
Converter
Force Converter
Convert newtons, dynes, pound-force, kilogram-force, kips, and ounce-force.
Context values
Some unit families need one extra value for a physically accurate result.
Femtonewton is 1e-15 newton units.
Result = input x 1e+21 / 1e-15.
Force uses the newton as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Zettanewtons to Femtonewtons
Zettanewton and Femtonewton both measure force, and the conversion matters whenever an SI-trained engineer needs to compare notes with a US-trained one, or vice versa. Specifically: Zettanewton is 1e+21 newton units, and femtonewton is 1e-15 newton units.
Formula
femtonewtons = zettanewtons × 1e+36
This factor comes from each unit's defined relationship to the category's base unit: 1 zettanewton equals 1e+21 base units, and 1 femtonewton equals 1e-15 base units, so dividing one by the other gives the direct zettanewton-to-femtonewton factor of 1e+36.
Simple example
1 ZN × 1e+36 = 1e+36 fN
1 zettanewton = 1e+36 femtonewtons.
Real-world example
10 ZN × 1e+36 = 1e+37 fN
10 zettanewtons = 1e+37 femtonewtons.
Conversion table
| Zettanewton (ZN) | Femtonewton (fN) |
|---|---|
| 1 ZN | 1e+36 fN |
| 5 ZN | 5e+36 fN |
| 10 ZN | 1e+37 fN |
| 50 ZN | 5e+37 fN |
| 100 ZN | 1e+38 fN |
| 1,000 ZN | 1e+39 fN |
Reverse conversion: Femtonewton to Zettanewton
1e+36 fN × 1e-36 = 1 ZN
1e+36 femtonewtons = 1 zettanewtons.
zettanewtons = femtonewtons × 1e-36
For a page dedicated to this direction, see Femtonewton to Zettanewton.
Understanding the Zettanewton (ZN)
Zettanewton is 1e+21 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 zettanewton?
1 zettanewton equals 1e+36 femtonewtons, using the exact defined conversion factor rather than an estimate.
How do I convert zettanewton to femtonewton?
Multiply the zettanewton value by 1e+36. The converter above does this instantly to whatever precision you set.
How do I convert femtonewton back to zettanewton?
Use the reverse factor: 1 femtonewton equals 1e-36 zettanewtons. You can also use the swap control in the converter above to flip the direction instantly.
What is a zettanewton?
Zettanewton (ZN) is a unit of force.
What is a femtonewton?
Femtonewton (fN) is a unit of force.
Is the zettanewton to femtonewton conversion exact?
Yes. Both zettanewton and femtonewton are defined by fixed standards rather than physical artifacts, so the factor of 1e+36 used above is exact to as many digits as you choose to display.