Pound-Feet to Pound-Inches Converter
Enter a value below to convert pound-feet to pound-inches - one pound-foot equals exactly 12 pound-inches. For the reverse, use our pound-inches to pound-feet converter.
1 lbf·ft = 12 lbf·in. Convert pound-force feet to pound-force inches. Need the reverse? See lbf·in to lbf·ft.
Pound-force foot
- Definition
- A pound-force foot (symbol: lbf·ft), usually written lb-ft or ft-lb, is a unit of torque in the imperial and US customary systems. It is the torque from one pound-force acting on a one-foot lever arm, and equals 1.355818 newton meters.
- History / origin
- It is built from the pound-force - the weight of a one-pound mass at standard gravity - and the foot. For torque it is written pound-feet (lbf·ft), while the identical product used for energy is written foot-pounds; the word order signals which quantity is meant.
- Current use
- Pound-feet are the everyday torque unit in the United States, especially in automotive work, where wheel-nut, spark-plug and cylinder-head torques are routinely specified in lb-ft alongside or instead of newton meters.
Pound-force inch
- Definition
- A pound-force inch (symbol: lbf·in), often written lb-in or in-lb, is a unit of torque equal to one pound-force applied on a one-inch lever arm. There are exactly 12 pound-inches in one pound-foot.
- History / origin
- Like the pound-foot it derives from the pound-force and the inch, one twelfth of a foot. It is the small-scale companion to the pound-foot, suited to light fasteners where a pound-foot would be an awkwardly small fraction.
- Current use
- Pound-inches are widely used for low-torque assembly in the United States - electronics, instruments, small engines and bicycle parts - and are marked on inch-pound torque wrenches and torque screwdrivers.
Pound-force foot to pound-force inch conversion table
| Pound-force foot [lbf·ft] | Pound-force inch [lbf·in] |
|---|---|
| 1 lbf·ft | 12 lbf·in |
| 2 lbf·ft | 24 lbf·in |
| 3 lbf·ft | 36 lbf·in |
| 4 lbf·ft | 48 lbf·in |
| 5 lbf·ft | 60 lbf·in |
| 10 lbf·ft | 120 lbf·in |
| 15 lbf·ft | 180 lbf·in |
| 20 lbf·ft | 240 lbf·in |
| 25 lbf·ft | 300 lbf·in |
| 30 lbf·ft | 360 lbf·in |
| 40 lbf·ft | 480 lbf·in |
| 50 lbf·ft | 600 lbf·in |
| 75 lbf·ft | 900 lbf·in |
| 100 lbf·ft | 1,200 lbf·in |
| 150 lbf·ft | 1,800 lbf·in |
| 200 lbf·ft | 2,400 lbf·in |
Popular pound-force foot to pound-force inch conversions
Everyday torque values, rounded to two decimals - the kind of figures you meet on real-world torque specifications.
| Pound-force foot [lbf·ft] | Pound-force inch [lbf·in] |
|---|---|
| 5 lbf·ft | 60 lbf·in |
| 10 lbf·ft | 120 lbf·in |
| 15 lbf·ft | 180 lbf·in |
| 20 lbf·ft | 240 lbf·in |
| 25 lbf·ft | 300 lbf·in |
| 30 lbf·ft | 360 lbf·in |
| 40 lbf·ft | 480 lbf·in |
| 50 lbf·ft | 600 lbf·in |
| 60 lbf·ft | 720 lbf·in |
| 75 lbf·ft | 900 lbf·in |
| 90 lbf·ft | 1,080 lbf·in |
| 100 lbf·ft | 1,200 lbf·in |
How to convert pound-force feet to pound-force inches
To convert pound-feet to pound-inches, multiply the pound-foot value by 12. For example, 25 lbf·ft = 25 × 12 = 300 lbf·in.
A foot is twelve inches, so the same pound-force over a foot produces twelve times the torque of one inch - the conversion is exact:
lbf·in = lbf·ft × 12
1 lbf·ft = 12 lbf·in · 1 lbf·in = 0.0833333333 lbf·ft
Example. To convert 50 lbf·ft to pound-inches, multiply by 12: 50 lbf·ft = 50 × 12 = 600 lbf·in. Going the other way, 120 lbf·in is 120 ÷ 12 = 10 lbf·ft.
When you need to convert pound-force feet to pound-force inches
Pound-foot to pound-inch conversion keeps imperial torque consistent across large and small fasteners. Common cases:
- Switching a lb-ft spec to inch-pounds for a smaller in-lb torque wrench or screwdriver.
- Comparing a large fastener torque (lb-ft) with a small one (in-lb) on the same job.
- Reading a spec sheet that mixes pound-feet and pound-inches.
- Setting an inch-pound tool when the manual quotes pound-feet.
- Teaching or checking the 12-to-1 relationship between the two imperial torque units.
Frequently asked questions
How do I convert pound-feet to pound-inches?
Multiply the pound-foot value by 12, because one pound-foot equals twelve pound-inches. For example, 25 lbf·ft equals 300 lbf·in.
How many pound-inches is 1 pound-foot?
One pound-foot equals exactly 12 pound-inches.
How many pound-inches is 50 lb-ft?
50 lbf·ft equals 600 pound-inches.
Why are there 12 pound-inches in a pound-foot?
Because a foot is twelve inches, applying the same pound-force over a foot gives twelve times the torque of one inch.
What is the formula to convert ft-lb to in-lb?
Multiply the pound-foot value by 12 to get pound-inches.
How do I convert pound-inches back to pound-feet?
Divide the pound-inch value by 12, or use our pound-inches to pound-feet converter.
Popular torque conversions
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Convert pound-force feet to other torque units
Convert a pound-force feet measurement into any other torque unit our converter supports.