Pound-force inch to Newton meter Converter
Enter the value that you want to convert pound-force inch (lbf*in) to newton meter (N*m) or newton meter to pound-force inch.Also written as LBF*IN to N*M conversion.
1 pound-force inch = 0.1129848 newton meter
Formula: newton meter = pound-force inch value × 0.1129848
LBF*IN to N*M — pound-force inch to newton meter
10 pound-force inch = 1.12985 newton meter
Popular Torque Converters:
How Pound-force inch Relates to Newton meter
The Pound-force inch in Engineering
Pound-force inch (lbf*in) is a unit of torque measurement. 1 pound-force inch is equal to 0.1129848 newton meter.
About the Newton meter
Newton meter (N*m) is a unit of torque measurement. 1 newton meter is equal to 8.8507481 pound-force inch.
Torque Units in Mechanical Engineering
Torque appears in newton-meters (SI), pound-force feet (US automotive), kilogram-force meters (some Asian specifications), and ounce-force inches (small fasteners). Every bolt torque specification, engine output curve, and electric motor datasheet requires understanding the correct unit. Cross-referencing between American and European automotive repair manuals is a daily conversion task for mechanics.
pound-force inch to newton meter metric conversion table
| 0.01 lbf*in | = | 0.00113 N*m |
| 0.1 lbf*in | = | 0.01130 N*m |
| 1 lbf*in | = | 0.11298 N*m |
| 2 lbf*in | = | 0.22597 N*m |
| 3 lbf*in | = | 0.33895 N*m |
| 4 lbf*in | = | 0.45194 N*m |
| 5 lbf*in | = | 0.56492 N*m |
| 6 lbf*in | = | 0.67791 N*m |
| 7 lbf*in | = | 0.79089 N*m |
| 8 lbf*in | = | 0.90388 N*m |
| 9 lbf*in | = | 1.01686 N*m |
| 10 lbf*in | = | 1.12985 N*m |
| 11 lbf*in | = | 1.24283 N*m |
| 12 lbf*in | = | 1.35582 N*m |
| 13 lbf*in | = | 1.46880 N*m |
| 14 lbf*in | = | 1.58179 N*m |
| 15 lbf*in | = | 1.69477 N*m |
| 16 lbf*in | = | 1.80776 N*m |
| 17 lbf*in | = | 1.92074 N*m |
| 18 lbf*in | = | 2.03373 N*m |
| 19 lbf*in | = | 2.14671 N*m |
| 20 lbf*in | = | 2.25970 N*m |
| 30 lbf*in | = | 3.38954 N*m |
| 40 lbf*in | = | 4.51939 N*m |
| 50 lbf*in | = | 5.64924 N*m |
| 60 lbf*in | = | 6.77909 N*m |
| 70 lbf*in | = | 7.90894 N*m |
| 80 lbf*in | = | 9.03878 N*m |
| 90 lbf*in | = | 10.16863 N*m |
| 100 lbf*in | = | 11.29848 N*m |
| 200 lbf*in | = | 22.59696 N*m |
| 300 lbf*in | = | 33.89544 N*m |
| 400 lbf*in | = | 45.19392 N*m |
| 500 lbf*in | = | 56.49240 N*m |
| 600 lbf*in | = | 67.79088 N*m |
| 700 lbf*in | = | 79.08936 N*m |
| 800 lbf*in | = | 90.38784 N*m |
| 900 lbf*in | = | 101.68632 N*m |
| 1000 lbf*in | = | 112.98480 N*m |
How to Convert LBF*IN to N*M (Pound-force inch to Newton meter)?
We can convert pound-force inch to newton meter by using an example.
Example:
Convert 20 Pound-force inch to Newton meter?
We know 1 Pound-force inch = 0.1129848 newton meter; 1 Newton meter = 8.8507481 pound-force inch.
20 pound-force inch = ___N*m
20 × 0.1129848 = 2.25970 N*m (we know 1 pound-force inch = 0.1129848 newton meter)
Answer:
20 pound-force inch = 2.25970 newton meter
Pound-Force Inches to Newton-Meters: Small Imperial Torque to SI
Lbf·in (pound-force inches) appears in American specifications for small fasteners, particularly in electronics, aviation instruments, and precision assemblies. Converting to N·m uses the factor 1 lbf·in = 0.11298 N·m. This conversion is necessary when using metric torque tools on components specified in inch-pounds.
- Start with the torque in lbf·in.
- Multiply by 0.11298.
- The result is the torque in N·m.
- Example: 50 lbf·in × 0.11298 = 5.65 N·m.
lbf·in to N·m for Small Fasteners
Inch-pound torque specs converted to metric:
| Pound-force inch | Newton meter |
|---|---|
| 5 lbf·in | 0.56 N·m |
| 10 lbf·in | 1.13 N·m |
| 20 lbf·in | 2.26 N·m |
| 40 lbf·in | 4.52 N·m |
| 60 lbf·in | 6.78 N·m |
| 89 lbf·in | 10.1 N·m |
| 120 lbf·in | 13.6 N·m |
| 200 lbf·in | 22.6 N·m |
Worked Examples: lbf·in to N·m
Question 1: An aircraft instrument panel screw requires 35 lbf·in. What metric torque setting?
Solution:
N·m = lbf·in × 0.11298
= 35 × 0.11298
= 3.95 N·m
Answer: 35 lbf·in = 3.95 N·m — set the metric wrench to 4 N·m.
Question 2: A carburetor bowl screw is specified at 18 lbf·in. Convert to N·m.
Solution:
N·m = lbf·in × 0.11298
= 18 × 0.11298
= 2.03 N·m
Answer: 18 lbf·in = 2.03 N·m — light torque to avoid stripping soft material.
Question 3: A brake caliper bleeder valve requires 110 lbf·in. Express in N·m.
Solution:
N·m = lbf·in × 0.11298
= 110 × 0.11298
= 12.43 N·m
Answer: 110 lbf·in = 12.43 N·m for the bleeder valve.
Practice: lbf·in to N·m
Try solving these on your own to test your understanding:
- Convert 72 lbf·in to N·m. (Answer: 8.13 N·m)
- A set screw needs 15 lbf·in. Express in N·m. (Answer: 1.69 N·m)
- Convert 150 lbf·in to N·m. (Answer: 16.9 N·m)
- An avionics connector torque is 8 lbf·in. What is this in N·m? (Answer: 0.90 N·m)
- Convert 95 lbf·in to N·m. (Answer: 10.7 N·m)
Aviation Torque: Where lbf·in Precision Is Critical
Aviation maintenance uses lbf·in extensively because aircraft have numerous small, safety-critical fasteners. AN (Army-Navy) bolts, instrument panel screws, and electrical terminal torques are all specified in lbf·in with tight tolerances. An AN3 bolt in shear might require 20-25 lbf·in (2.3-2.8 N·m), and over-torquing by even 30% can cause fatigue failure in aluminum structure.
Converting lbf·in to lbf·ft Before Going to N·m
An alternative conversion path: first divide lbf·in by 12 to get lbf·ft, then multiply by 1.3558 to get N·m. For example: 96 lbf·in ÷ 12 = 8 lbf·ft × 1.3558 = 10.85 N·m. Both paths (direct × 0.11298 or via ft·lb) give the same result. Use whichever method matches the conversion factors you have memorized.
Key Takeaways
- 1 lbf·in = 0.11298 N·m (multiply lbf·in by 0.113).
- Quick estimate: divide lbf·in by 9 for approximate N·m.
- Aviation heavily uses lbf·in for small, safety-critical fasteners.
- Alternative: lbf·in ÷ 12 = lbf·ft, then × 1.3558 = N·m.
- The in·lb range (5-200 lbf·in) corresponds to about 0.6-22.6 N·m.
Pound-force inch to Newton meter Conversion Formula
newton meter = pound-force inch × 0.1129848
1 pound-force inch = 0.1129848 newton meter
1 newton meter = 8.8507481 pound-force inch
Reverse: pound-force inch = newton meter × 8.8507481
Frequently Asked Questions
How many newton meter are in 1 pound-force inch?
There are 0.1129848 newton meter in 1 pound-force inch. To convert pound-force inch to newton meter, multiply the value by 0.1129848.
How do I convert pound-force inch to newton meter?
Multiply your pound-force inch value by 0.1129848 to get the equivalent in newton meter. For example, 5 pound-force inch = 5 × 0.1129848 = 0.56492 newton meter.
How do I convert newton meter to pound-force inch?
Multiply your newton meter value by 8.8507481 to get the equivalent in pound-force inch. Alternatively, divide by 0.1129848.
What is 10 pound-force inch in newton meter?
10 pound-force inch is equal to 1.12985 newton meter.
What is 100 pound-force inch in newton meter?
100 pound-force inch is equal to 11.29848 newton meter.