Pound-Feet to Kilogram-Force Meters Conversion Chart
| Pound-foot (lb-ft) | Kilogram-meter (kgf-m) | Reference Benchmark | Formula Step |
|---|---|---|---|
| 1 lb-ft | 0.14 kgf-m | Small Electric Actuator Output Test Bench Reading | 1 × 0.138255 = 0.138 kgf·m |
| 5 lb-ft | 0.69 kgf-m | Lawn and Garden Small Engine Valve Cover Bolt | 5 × 0.138255 = 0.691 kgf·m |
| 10 lb-ft | 1.38 kgf-m | Automotive Transmission Pan Oil Sump Bolt Rating | 10 × 0.138255 = 1.38 kgf·m |
| 15 lb-ft | 2.07 kgf-m | Motorcycle Engine Rocker Cover Fastening Spec | 15 × 0.138255 = 2.07 kgf·m |
| 20 lb-ft | 2.77 kgf-m | Light Vehicle Aluminum Intake Manifold Bolt | 20 × 0.138255 = 2.77 kgf·m |
| 25 lb-ft | 3.46 kgf-m | Motorcycle Rear Footrest Bracket Fastener | 25 × 0.138255 = 3.46 kgf·m |
| 50 lb-ft | 6.91 kgf-m | Classic Engine Connecting Rod Cap Bolt Rating | 50 × 0.138255 = 6.91 kgf·m |
| 75 lb-ft | 10.37 kgf-m | Passenger Car Cylinder Head Initial Stage Spec | 75 × 0.138255 = 10.37 kgf·m |
| 80 lb-ft | 11.06 kgf-m | Domestic Automobile Wheel Lug Nut Tightening | 80 × 0.138255 = 11.06 kgf·m |
| 100 lb-ft | 13.83 kgf-m | Full-Size Pickup Wheel Lug Nut Fastening Spec | 100 × 0.138255 = 13.83 kgf·m |
| 150 lb-ft | 20.74 kgf-m | Diesel Engine Crankshaft Main Bearing Cap Bolt | 150 × 0.138255 = 20.74 kgf·m |
| 200 lb-ft | 27.65 kgf-m | Commercial Truck Front Axle Hub Retaining Nut | 200 × 0.138255 = 27.65 kgf·m |
| 250 lb-ft | 34.56 kgf-m | Heavy Commercial Truck Suspension Spring U-Bolt | 250 × 0.138255 = 34.56 kgf·m |
| 300 lb-ft | 41.48 kgf-m | Industrial Agricultural Tractor PTO Output Shaft Nut | 300 × 0.138255 = 41.48 kgf·m |
| 500 lb-ft | 69.13 kgf-m | Heavy Earthmoving Machinery Rim Mounting Bolt Spec | 500 × 0.138255 = 69.13 kgf·m |
Pound-foot to Kilogram-meter Formula & Unit Definitions
The conversion between pound-feet and kilogram-force meters combines imperial force-length definitions with Earth's standard gravitational acceleration. One pound-force foot equals 1.355817948 N·m, while one kilogram-force meter equals 9.80665 N·m. Dividing these fundamental constants (1.355817948 ÷ 9.80665) produces approximately 0.13825495 (~0.138255). Multiplying any torque value in pound-feet by 0.138255 yields the equivalent in kilogram-force meters.
Quick Estimation: Quick mental shortcut: To convert pound-feet to kilogram-force meters in your head, divide the pound-feet by 7 (or divide by 10 and multiply by 1.4). For example, 70 lbf·ft ÷ 7 ≈ 10 kgf·m (exact: 9.68 kgf·m); 100 lbf·ft gives 10 × 1.4 = 14 kgf·m (exact: 13.83 kgf·m).
Pound-foot — lbf·ft
Imperial & US Customary- Standard imperial unit of rotational moment (1 pound-force applied at a 1-foot radius)
- Dominant specification across North American domestic automakers, aerospace, and heavy equipment
- Equivalent to approximately 0.138255 kilogram-force meters (1.355818 N·m)
Kilogram-force meter — kgf·m
Gravitational Metric Legacy- Gravitational metric torque unit representing 1 kgf acting at a 1-meter moment arm
- Standard specification in classic Japanese Industrial Standards (JIS) and European shop manuals
- Equivalent to 7.233014 pound-feet (9.80665 N·m, often written as kg-m or m-kg)
Frequently Asked Questions
Q.How do you convert pound-feet to kilogram-meters accurately?
Multiply the torque value in pound-feet by 0.138255 (derived from 1.355818 N·m / 9.80665 N). For example, 100 lbf·ft × 0.138255 = 13.83 kgf·m.
Q.What is the reverse conversion from kilogram-meters to pound-feet?
To reverse the calculation, use the Kilogram-Force Meters to Pound-Feet Converter where 1 kgf·m equals approximately 7.233014 lbf·ft.
Q.When do mechanics need to convert between lbf·ft and kgf·m?
When restoring classic Japanese vehicles using US tools, or servicing international agricultural machinery with imperial torque wrenches.
Q.What is the difference between gravitational metric torque and imperial torque?
Kilogram-meters rely on standard Earth gravity (9.80665 m/s²), while pound-feet rely on the avoirdupois pound-force acting at a 1-foot moment arm.