Attonewton meter is 1e-18 newton meter units.
Attonewton meters to Pound-feet Converter — aN m to lb ft
Convert Attonewton meter (aN m) to Pound-foot (lb ft) using the exact conversion factor (1 attonewton meter = 7.375621e-19 pound-foot). See the formula, worked examples, conversion table, history, and common uses.
Attonewton meters to Pound-feet 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.
Torque from one pound-force at one foot.
Result = input x 1e-18 / 1.355817948.
Torque uses the newton meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Attonewton meters to Pound-feet
Attonewton meter and Pound-foot 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: Attonewton meter is 1e-18 newton meter units, and torque from one pound-force at one foot.
Formula
pound-feet = attonewton meters × 7.375621e-19
This factor comes from each unit's defined relationship to the category's base unit: 1 attonewton meter equals 1e-18 base units, and 1 pound-foot equals 1.35581794833 base units, so dividing one by the other gives the direct attonewton meter-to-pound-foot factor of 7.375621e-19.
Simple example
1 aN m × 7.375621e-19 = 7.375621e-19 lb ft
1 attonewton meter = 7.375621e-19 pound-feet.
Real-world example
10 aN m × 7.375621e-19 = 7.375621e-18 lb ft
10 attonewton meters = 7.375621e-18 pound-feet.
Conversion table
| Attonewton meter (aN m) | Pound-foot (lb ft) |
|---|---|
| 1 aN m | 7.375621e-19 lb ft |
| 5 aN m | 3.687811e-18 lb ft |
| 10 aN m | 7.375621e-18 lb ft |
| 50 aN m | 3.687811e-17 lb ft |
| 100 aN m | 7.375621e-17 lb ft |
| 500 aN m | 3.687811e-16 lb ft |
Reverse conversion: Pound-foot to Attonewton meter
7.375621e-19 lb ft × 1.355818e+18 = 0.9999999332 aN m
7.375621e-19 pound-feet = 0.9999999332 attonewton meters.
attonewton meters = pound-feet × 1.355818e+18
For a page dedicated to this direction, see Pound-foot to Attonewton meter.
Understanding the Attonewton meter (aN m)
Attonewton meter is 1e-18 newton meter units.
Understanding the Pound-foot
Pound-foot (lb ft) measures torque. A pound-foot is the torque from one pound-force applied at one foot of leverage: exactly 1.3558179483314004 newton-meters. It is classified as a US/imperial customary unit.
Where it's used: United States (automotive and mechanical torque specifications)
Pound-foot vs. foot-pound. Pound-foot (torque) and foot-pound (energy/work) use the same two units but measure physically different quantities; US convention typically orders them differently to help distinguish which is meant, though usage isn't always consistent.
Uses of the Pound-foot today
- US torque wrench specifications (bolt tightening)
- US automotive engine torque specifications
- US mechanical and construction trades
History of the Pound-foot
The pound-foot follows from pound-force and the foot, both standardized through English and later international agreements, remaining the standard US automotive and mechanical torque unit even as most other measurements shifted toward metric in engineering contexts.
Historical origin. Pound-foot was not the invention of a single named person; it developed through the process described above.
Pound-foot — sources
- NIST Special Publication 811 — Documents the pound-foot's exact newton-meter equivalence.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many pound-feet are in 1 attonewton meter?
1 attonewton meter equals 7.375621e-19 pound-feet, using the exact defined conversion factor rather than an estimate.
How do I convert attonewton meter to pound-foot?
Multiply the attonewton meter value by 7.375621e-19. The converter above does this instantly to whatever precision you set.
How do I convert pound-foot back to attonewton meter?
Use the reverse factor: 1 pound-foot equals 1.355818e+18 attonewton meters. You can also use the swap control in the converter above to flip the direction instantly.
What is a attonewton meter?
Attonewton meter (aN m) is a unit of torque.
What is a pound-foot?
Pound-foot (lb ft) measures torque. A pound-foot is the torque from one pound-force applied at one foot of leverage: exactly 1.3558179483314004 newton-meters. It is classified as a US/imperial customary unit.
Is the attonewton meter to pound-foot conversion exact?
Yes. A pound-foot is the torque from one pound-force applied at one foot of leverage: exactly 1.3558179483314004 newton-meters. That fixed definition is what the converter above uses, so any rounding you see is a display choice, not a limitation of the math.
What is the difference between pound-foot vs. foot-pound?
Pound-foot (torque) and foot-pound (energy/work) use the same two units but measure physically different quantities; US convention typically orders them differently to help distinguish which is meant, though usage isn't always consistent.