Newton meter is the SI torque unit.
Newton meters to Femtonewton meters Converter — N m to fN m
Convert Newton meter (N m) to Femtonewton meter (fN m) using the exact conversion factor (1 newton meter = 1e+15 femtonewton meter). See the formula, worked examples, conversion table, history, and common uses.
Newton meters to Femtonewton meters converter
Converter
Torque Converter
Convert newton meters, pound-feet, pound-inches, ounce-inches, and kilogram-force meters.
Context values
Some unit families need one extra value for a physically accurate result.
Femtonewton meter is 1e-15 newton meter units.
Result = input x 1 / 1e-15.
Torque uses the newton meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Newton meters to Femtonewton meters
Newton meter and Femtonewton meter both measure torque, and the conversion is essential for anyone using a torque wrench specified in one unit against a bolt or engine spec given in the other. Newton meter is most often used for torque wrench specifications (bolt tightening) outside the us.
Formula
femtonewton meters = newton meters × 1e+15
This factor comes from each unit's defined relationship to the category's base unit: 1 newton meter equals 1 base unit, and 1 femtonewton meter equals 1e-15 base units, so dividing one by the other gives the direct newton meter-to-femtonewton meter factor of 1e+15.
Simple example
1 N m × 1e+15 = 1e+15 fN m
1 newton meter = 1e+15 femtonewton meters.
Real-world example
10 N m × 1e+15 = 1e+16 fN m
10 newton meters = 1e+16 femtonewton meters.
Conversion table
| Newton meter (N m) | Femtonewton meter (fN m) |
|---|---|
| 1 N m | 1e+15 fN m |
| 5 N m | 5e+15 fN m |
| 10 N m | 1e+16 fN m |
| 50 N m | 5e+16 fN m |
| 100 N m | 1e+17 fN m |
| 500 N m | 5e+17 fN m |
Reverse conversion: Femtonewton meter to Newton meter
1e+15 fN m × 1e-15 = 1 N m
1e+15 femtonewton meters = 1 newton meter.
newton meters = femtonewton meters × 1e-15
For a page dedicated to this direction, see Femtonewton meter to Newton meter.
Understanding the Newton meter
Newton meter (N m) measures torque. The newton-meter is the SI derived unit of torque: one newton of force applied at one meter of leverage. It is classified as a SI derived unit.
Where it's used: Standard scientific and automotive torque unit worldwide except the US
Uses of the Newton meter today
- Torque wrench specifications (bolt tightening) outside the US
- Engine torque specifications internationally
- Mechanical and structural engineering
History of the Newton meter
As a coherent SI derived unit, the newton-meter follows automatically from the newton and meter, without an independent historical origin — though it is numerically identical in form to the joule (energy), the two are conventionally kept distinct because torque and energy are physically different quantities.
Historical origin. Newton meter was not the invention of a single named person; it developed through the process described above.
Understanding the Femtonewton meter (fN m)
Femtonewton meter is 1e-15 newton meter units.
Newton meter — sources
- BIPM SI Brochure — Coherent derived units — Defines the newton-meter as the SI unit of torque.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many femtonewton meters are in 1 newton meter?
1 newton meter equals 1e+15 femtonewton meters, using the exact defined conversion factor rather than an estimate.
How do I convert newton meter to femtonewton meter?
Multiply the newton meter value by 1e+15. The converter above does this instantly to whatever precision you set.
How do I convert femtonewton meter back to newton meter?
Use the reverse factor: 1 femtonewton meter equals 1e-15 newton meters. You can also use the swap control in the converter above to flip the direction instantly.
What is a newton meter?
Newton meter (N m) measures torque. The newton-meter is the SI derived unit of torque: one newton of force applied at one meter of leverage. It is classified as a SI derived unit.
What is a femtonewton meter?
Femtonewton meter (fN m) is a unit of torque.
Is the newton meter to femtonewton meter conversion exact?
Yes. Both newton meter and femtonewton meter are defined by fixed standards rather than physical artifacts, so the factor of 1e+15 used above is exact to as many digits as you choose to display.
Where is the newton meter still used today?
Standard scientific and automotive torque unit worldwide except the US