Zeptonewton is 1e-21 newton units.
Zeptonewtons to Exanewtons Converter — zN to EN
Convert Zeptonewton (zN) to Exanewton (EN) using the exact conversion factor (1 zeptonewton = 1e-39 exanewton). See the formula, worked examples, and conversion table.
Zeptonewtons to Exanewtons 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.
Exanewton is 1000000000000000000 newton units.
Result = input x 1e-21 / 1e+18.
Force uses the newton as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Zeptonewtons to Exanewtons
Zeptonewton and Exanewton 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: Zeptonewton is 1e-21 newton units, and exanewton is 1000000000000000000 newton units.
Formula
exanewtons = zeptonewtons × 1e-39
This factor comes from each unit's defined relationship to the category's base unit: 1 zeptonewton equals 1e-21 base units, and 1 exanewton equals 1e+18 base units, so dividing one by the other gives the direct zeptonewton-to-exanewton factor of 1e-39.
Simple example
1 zN × 1e-39 = 1e-39 EN
1 zeptonewton = 1e-39 exanewtons.
Real-world example
10 zN × 1e-39 = 1e-38 EN
10 zeptonewtons = 1e-38 exanewtons.
Conversion table
| Zeptonewton (zN) | Exanewton (EN) |
|---|---|
| 1 zN | 1e-39 EN |
| 5 zN | 5e-39 EN |
| 10 zN | 1e-38 EN |
| 50 zN | 5e-38 EN |
| 100 zN | 1e-37 EN |
| 1,000 zN | 1e-36 EN |
Reverse conversion: Exanewton to Zeptonewton
1e-39 EN × 1e+39 = 1 zN
1e-39 exanewtons = 1 zeptonewton.
zeptonewtons = exanewtons × 1e+39
For a page dedicated to this direction, see Exanewton to Zeptonewton.
Understanding the Zeptonewton (zN)
Zeptonewton is 1e-21 newton units.
Understanding the Exanewton (EN)
Exanewton is 1000000000000000000 newton units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many exanewtons are in 1 zeptonewton?
1 zeptonewton equals 1e-39 exanewtons, using the exact defined conversion factor rather than an estimate.
How do I convert zeptonewton to exanewton?
Multiply the zeptonewton value by 1e-39. The converter above does this instantly to whatever precision you set.
How do I convert exanewton back to zeptonewton?
Use the reverse factor: 1 exanewton equals 1e+39 zeptonewtons. You can also use the swap control in the converter above to flip the direction instantly.
What is a zeptonewton?
Zeptonewton (zN) is a unit of force.
What is a exanewton?
Exanewton (EN) is a unit of force.
Is the zeptonewton to exanewton conversion exact?
Yes. Both zeptonewton and exanewton are defined by fixed standards rather than physical artifacts, so the factor of 1e-39 used above is exact to as many digits as you choose to display.