Torque from one pound-force at one inch.
Pound-inches to Femtonewton meters Converter — lb in to fN m
Convert Pound-inch (lb in) to Femtonewton meter (fN m) using the exact conversion factor (1 pound-inch = 1.129848e+14 femtonewton meter). See the formula, worked examples, and conversion table.
Pound-inches 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 0.112984829 / 1e-15.
Torque uses the newton meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Pound-inches to Femtonewton meters
Pound-inch 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. Specifically: Torque from one pound-force at one inch, and femtonewton meter is 1e-15 newton meter units.
Formula
femtonewton meters = pound-inches × 1.129848e+14
This factor comes from each unit's defined relationship to the category's base unit: 1 pound-inch equals 0.112984829028 base units, and 1 femtonewton meter equals 1e-15 base units, so dividing one by the other gives the direct pound-inch-to-femtonewton meter factor of 1.129848e+14.
Simple example
1 lb in × 1.129848e+14 = 1.129848e+14 fN m
1 pound-inch = 1.129848e+14 femtonewton meters.
Real-world example
10 lb in × 1.129848e+14 = 1.129848e+15 fN m
10 pound-inches = 1.129848e+15 femtonewton meters.
Conversion table
| Pound-inch (lb in) | Femtonewton meter (fN m) |
|---|---|
| 1 lb in | 1.129848e+14 fN m |
| 5 lb in | 5.649241e+14 fN m |
| 10 lb in | 1.129848e+15 fN m |
| 50 lb in | 5.649241e+15 fN m |
| 100 lb in | 1.129848e+16 fN m |
| 500 lb in | 5.649241e+16 fN m |
Reverse conversion: Femtonewton meter to Pound-inch
1.129848e+14 fN m × 8.850746e-15 = 0.9999997431 lb in
1.129848e+14 femtonewton meters = 0.9999997431 pound-inches.
pound-inches = femtonewton meters × 8.850746e-15
For a page dedicated to this direction, see Femtonewton meter to Pound-inch.
Understanding the Pound-inch (lb in)
Torque from one pound-force at one inch.
Understanding the Femtonewton meter (fN m)
Femtonewton meter is 1e-15 newton meter units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many femtonewton meters are in 1 pound-inch?
1 pound-inch equals 1.129848e+14 femtonewton meters, using the exact defined conversion factor rather than an estimate.
How do I convert pound-inch to femtonewton meter?
Multiply the pound-inch value by 1.129848e+14. The converter above does this instantly to whatever precision you set.
How do I convert femtonewton meter back to pound-inch?
Use the reverse factor: 1 femtonewton meter equals 8.850746e-15 pound-inches. You can also use the swap control in the converter above to flip the direction instantly.
What is a pound-inch?
Pound-inch (lb in) is a unit of torque.
What is a femtonewton meter?
Femtonewton meter (fN m) is a unit of torque.
Is the pound-inch to femtonewton meter conversion exact?
Yes. Both pound-inch and femtonewton meter are defined by fixed standards rather than physical artifacts, so the factor of 1.129848e+14 used above is exact to as many digits as you choose to display.