Millinewton is 0.001 newton units.
Millinewtons to Zeptonewtons Converter — mN to zN
Convert Millinewton (mN) to Zeptonewton (zN) using the exact conversion factor (1 millinewton = 1e+18 zeptonewton). See the formula, worked examples, and conversion table.
Millinewtons to Zeptonewtons 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.
Zeptonewton is 1e-21 newton units.
Result = input x 0.001 / 1e-21.
Force uses the newton as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Millinewtons to Zeptonewtons
Millinewton and Zeptonewton 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: Millinewton is 0.001 newton units, and zeptonewton is 1e-21 newton units.
Formula
zeptonewtons = millinewtons × 1e+18
This factor comes from each unit's defined relationship to the category's base unit: 1 millinewton equals 0.001 base units, and 1 zeptonewton equals 1e-21 base units, so dividing one by the other gives the direct millinewton-to-zeptonewton factor of 1e+18.
Simple example
1 mN × 1e+18 = 1e+18 zN
1 millinewton = 1e+18 zeptonewtons.
Real-world example
10 mN × 1e+18 = 1e+19 zN
10 millinewtons = 1e+19 zeptonewtons.
Conversion table
| Millinewton (mN) | Zeptonewton (zN) |
|---|---|
| 1 mN | 1e+18 zN |
| 5 mN | 5e+18 zN |
| 10 mN | 1e+19 zN |
| 50 mN | 5e+19 zN |
| 100 mN | 1e+20 zN |
| 1,000 mN | 1e+21 zN |
Reverse conversion: Zeptonewton to Millinewton
1e+18 zN × 1e-18 = 1 mN
1e+18 zeptonewtons = 1 millinewtons.
millinewtons = zeptonewtons × 1e-18
For a page dedicated to this direction, see Zeptonewton to Millinewton.
Understanding the Millinewton (mN)
Millinewton is 0.001 newton units.
Understanding the Zeptonewton (zN)
Zeptonewton is 1e-21 newton units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many zeptonewtons are in 1 millinewton?
1 millinewton equals 1e+18 zeptonewtons, using the exact defined conversion factor rather than an estimate.
How do I convert millinewton to zeptonewton?
Multiply the millinewton value by 1e+18. The converter above does this instantly to whatever precision you set.
How do I convert zeptonewton back to millinewton?
Use the reverse factor: 1 zeptonewton equals 1e-18 millinewtons. You can also use the swap control in the converter above to flip the direction instantly.
What is a millinewton?
Millinewton (mN) is a unit of force.
What is a zeptonewton?
Zeptonewton (zN) is a unit of force.
Is the millinewton to zeptonewton conversion exact?
Yes. Both millinewton and zeptonewton are defined by fixed standards rather than physical artifacts, so the factor of 1e+18 used above is exact to as many digits as you choose to display.