Foot-pound to Newton meter Converter
Enter the value that you want to convert foot-pound (ft*lbf) to newton meter (N.m) or newton meter to foot-pound.
1 foot-pound = 1.3558179 newton meter
Formula: newton meter = foot-pound value × 1.3558179
FT*LBF to N.M — foot-pound to newton meter
10 foot-pound = 13.55818 newton meter
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Why Convert Foot-pound to Newton meter?
What is Foot-pound?
Foot-pound (ft*lbf) is a unit of energy measurement. 1 foot-pound is equal to 1.3558179 newton meter.
About the Newton meter
Newton meter (N.m) is a unit of energy measurement. 1 newton meter is equal to 0.7375621 foot-pound.
Energy Units in Different Fields
Energy measurement units reflect their historical origins across different industries. Electrical engineers use kilowatt-hours, nutritionists use calories, physicists use joules, heating engineers use BTUs, and the petroleum industry uses barrels of oil equivalent. Converting between these units is essential for energy auditing, comparing fuel sources, sizing HVAC systems, and understanding electricity bills relative to gas consumption.
foot-pound to newton meter metric conversion table
| 0.01 ft*lbf | = | 0.01356 N.m |
| 0.1 ft*lbf | = | 0.13558 N.m |
| 1 ft*lbf | = | 1.35582 N.m |
| 2 ft*lbf | = | 2.71164 N.m |
| 3 ft*lbf | = | 4.06745 N.m |
| 4 ft*lbf | = | 5.42327 N.m |
| 5 ft*lbf | = | 6.77909 N.m |
| 6 ft*lbf | = | 8.13491 N.m |
| 7 ft*lbf | = | 9.49073 N.m |
| 8 ft*lbf | = | 10.84654 N.m |
| 9 ft*lbf | = | 12.20236 N.m |
| 10 ft*lbf | = | 13.55818 N.m |
| 11 ft*lbf | = | 14.91400 N.m |
| 12 ft*lbf | = | 16.26982 N.m |
| 13 ft*lbf | = | 17.62563 N.m |
| 14 ft*lbf | = | 18.98145 N.m |
| 15 ft*lbf | = | 20.33727 N.m |
| 16 ft*lbf | = | 21.69309 N.m |
| 17 ft*lbf | = | 23.04891 N.m |
| 18 ft*lbf | = | 24.40472 N.m |
| 19 ft*lbf | = | 25.76054 N.m |
| 20 ft*lbf | = | 27.11636 N.m |
| 30 ft*lbf | = | 40.67454 N.m |
| 40 ft*lbf | = | 54.23272 N.m |
| 50 ft*lbf | = | 67.79090 N.m |
| 60 ft*lbf | = | 81.34908 N.m |
| 70 ft*lbf | = | 94.90726 N.m |
| 80 ft*lbf | = | 108.46544 N.m |
| 90 ft*lbf | = | 122.02362 N.m |
| 100 ft*lbf | = | 135.58179 N.m |
| 200 ft*lbf | = | 271.16359 N.m |
| 300 ft*lbf | = | 406.74538 N.m |
| 400 ft*lbf | = | 542.32718 N.m |
| 500 ft*lbf | = | 677.90897 N.m |
| 600 ft*lbf | = | 813.49077 N.m |
| 700 ft*lbf | = | 949.07256 N.m |
| 800 ft*lbf | = | 1084.65436 N.m |
| 900 ft*lbf | = | 1220.23615 N.m |
| 1000 ft*lbf | = | 1355.81795 N.m |
How to Convert FT*LBF to N.M (Foot-pound to Newton meter)?
We can convert foot-pound to newton meter by using an example.
Example:
Convert 20 Foot-pound to Newton meter?
We know 1 Foot-pound = 1.3558179 newton meter; 1 Newton meter = 0.7375621 foot-pound.
20 foot-pound = ___N.m
20 × 1.3558179 = 27.11636 N.m (we know 1 foot-pound = 1.3558179 newton meter)
Answer:
20 foot-pound = 27.11636 newton meter
Foot-Pounds to Newton-Meters: Converting American Torque to Metric
Foot-pounds (ft·lb) is the dominant torque unit in American automotive, construction, and aerospace. Converting to Newton-meters (N·m) is necessary when working with metric fasteners, European vehicle specs, or international engineering standards. The factor is 1 ft·lb = 1.3558 N·m.
- Start with the torque in ft·lb.
- Multiply by 1.3558.
- The result is the torque in N·m.
- Example: 100 ft·lb × 1.3558 = 135.58 N·m.
ft·lb to N·m: Automotive Torque Reference
Common American torque specs converted to metric:
| Foot-pound | Newton meter |
|---|---|
| 10 ft·lb | 13.6 N·m |
| 18 ft·lb | 24.4 N·m |
| 25 ft·lb | 33.9 N·m |
| 50 ft·lb | 67.8 N·m |
| 80 ft·lb | 108.5 N·m |
| 100 ft·lb | 135.6 N·m |
| 250 ft·lb | 338.9 N·m |
| 500 ft·lb | 677.9 N·m |
Solved Examples: ft·lb to N·m
Question 1: A Corvette engine produces 470 ft·lb of torque. What is this in N·m?
Solution:
N·m = ft·lb × 1.3558
= 470 × 1.3558
= 637.2 N·m
Answer: 470 ft·lb = 637.2 N·m — a high-performance V8 torque output.
Question 2: Wheel lug nuts require 100 ft·lb. What torque wrench setting in N·m?
Solution:
N·m = ft·lb × 1.3558
= 100 × 1.3558
= 135.6 N·m
Answer: 100 ft·lb = 135.6 N·m — set your metric torque wrench to 136 N·m.
Question 3: A connecting rod bolt spec is 38 ft·lb. Express in N·m.
Solution:
N·m = ft·lb × 1.3558
= 38 × 1.3558
= 51.5 N·m
Answer: 38 ft·lb = 51.5 N·m for the connecting rod bolts.
Practice: ft·lb to N·m
Try solving these on your own to test your understanding:
- Convert 75 ft·lb to N·m. (Answer: 101.7 N·m)
- A pickup truck makes 400 ft·lb. Express in N·m. (Answer: 542.3 N·m)
- Convert 22 ft·lb (thermostat housing) to N·m. (Answer: 29.8 N·m)
- An axle nut requires 150 ft·lb. What is this in N·m? (Answer: 203.4 N·m)
- Convert 600 ft·lb to N·m. (Answer: 813.5 N·m)
ft·lb vs. lb·ft: Are They the Same?
In torque context, "ft·lb" and "lb·ft" (pound-feet vs. foot-pounds) refer to the same unit: force (pounds) times distance (feet). Both notations are correct and interchangeable for torque. However, "ft·lb" also means foot-pounds of energy/work. To avoid confusion, SAE International recommends "lb·ft" for torque specifically, though "ft·lb" remains more common in everyday use.
Torque-Angle Method: Beyond ft·lb Specifications
Modern engines often specify fasteners with a torque-angle method: "25 ft·lb (34 N·m) + 90°" means torque to the initial value, then rotate an additional quarter turn. This ensures consistent bolt stretch regardless of thread friction variations. The initial ft·lb/N·m value seats the fastener, while the angle spec provides the actual clamping load.
Key Takeaways
- 1 ft·lb = 1.3558 N·m (multiply ft·lb by 1.3558).
- Quick estimate: ft·lb × 4/3 ≈ N·m (within 2%).
- "ft·lb" and "lb·ft" are interchangeable for torque.
- US automotive specs use ft·lb; import cars use N·m.
- Modern engines often combine a N·m/ft·lb value with an angle spec.
Foot-pound to Newton meter Conversion Formula
newton meter = foot-pound × 1.3558179
1 foot-pound = 1.3558179 newton meter
1 newton meter = 0.7375621 foot-pound
Reverse: foot-pound = newton meter × 0.7375621
Frequently Asked Questions
How many newton meter are in 1 foot-pound?
There are 1.3558179 newton meter in 1 foot-pound. To convert foot-pound to newton meter, multiply the value by 1.3558179.
How do I convert foot-pound to newton meter?
Multiply your foot-pound value by 1.3558179 to get the equivalent in newton meter. For example, 5 foot-pound = 5 × 1.3558179 = 6.77909 newton meter.
How do I convert newton meter to foot-pound?
Multiply your newton meter value by 0.7375621 to get the equivalent in foot-pound. Alternatively, divide by 1.3558179.
What is 10 foot-pound in newton meter?
10 foot-pound is equal to 13.55818 newton meter.
What is 100 foot-pound in newton meter?
100 foot-pound is equal to 135.58179 newton meter.