Convert Pounds per Foot to Pounds per Inch
Instantly convert Pounds per Foot (lb/ft) to Pounds per Inch (lb/in) with our free online calculator.
Formula: lb/ft to lb/in — multiply by 0.083333
Reference Table
| Pounds per Foot (lb/ft) | Pounds per Inch (lb/in) |
|---|---|
| 1 | 0.083333 |
| 5 | 0.416665 |
| 10 | 0.83333 |
| 25 | 2.08332 |
| 50 | 4.16665 |
| 100 | 8.3333 |
How to Convert Pounds per Foot to Pounds per Inch
Formula
To convert Pounds per Foot (lb/ft) to Pounds per Inch (lb/in): multiply by 0.083333
Step-by-Step
- Start with your value in Pounds per Foot (lb/ft).
- Multiply by 0.083333 to perform the conversion.
- The result is your value expressed in Pounds per Inch (lb/in).
Conversion Factor
1 lb/ft = 0.083333 lb/in
Reverse Factor
1 lb/in = 12.0001 lb/ft
Worked Example
Convert 25 Pounds per Foot to Pounds per Inch: 25 lb/ft = 2.08332 lb/in
About Pound per Foot (lb/ft)
An imperial linear-density unit (≈ 1.4882 kg/m per NIST SP 811). The single most important imperial linear-density unit in US engineering because US structural-steel shapes are NAMED by their lb/ft mass per AISC convention: 'W14×90' designates a 14-inch nominal-depth wide-flange beam weighing exactly 90 lb/ft (the second number is always the lb/ft mass). The AISC Steel Construction Manual lists every rolled-steel shape — W, S, M, HP, HSS, C, MC, L, WT, MT — by its lb/ft nominal weight. Also the universal unit for oil-country tubular goods (OCTG) casing and tubing per API 5CT (a typical 5-1/2 inch OD production tubing is 17 lb/ft; 9-5/8 inch OD intermediate casing is 47 lb/ft), petroleum pipeline specifications per API 5L (a 30-inch OD crude-oil pipeline at 0.5-inch wall is ~158 lb/ft), and marine anchor-chain ratings per ABS / DNV (3-inch stud-link anchor chain ~90 lb/ft). Convert lb/ft to kg/m by multiplying by 1.4882; to lb/in by dividing by 12.
About Pound per Inch (lb/in)
An imperial linear-density unit equal to exactly 12 × lb/ft (≈ 17.858 kg/m per NIST SP 811). lb/in is used occasionally in US engineering for small-cross-section components where lb/ft would produce small decimal values: small US-manufactured precision-machined wire (round bar stock from McMaster-Carr / MSC Industrial Supply lists weight-per-inch for small diameters), specialty tooling (broaches, taps, drills, gun-barrel stock), small structural sections in MIL-SPEC aerospace and defense applications (MIL-STD-1539 microelectronics-package mass-spec sheets, occasional small-airframe spar-cap weight-per-inch in legacy aircraft drawings), and some pre-1980s machine-shop reference tables. 1 lb/in = 12 lb/ft ≈ 17.86 kg/m. Much less common than lb/ft in everyday US structural engineering but persists in specialty tooling, fastener-stock, and small-arms ammunition projectile-weight specifications.
Quick Facts
- 1 Pound per Foot equals 0.083333 Pounds per Inch
- 1 Pound per Inch equals 12.0001 Pounds per Foot
- Pound per Foot is a unit of linear density
- Pound per Inch is a unit of linear density
- This conversion is commonly used in textile manufacturing, cable engineering, and structural analysis
- The Pound per Foot belongs to the imperial system
Common Pound per Foot to Pound per Inch Conversions
| Pounds per Foot (lb/ft) | Pounds per Inch (lb/in) |
|---|---|
| 0.01 | 0.00083333 |
| 0.1 | 0.0083333 |
| 0.25 | 0.0208332 |
| 0.5 | 0.0416665 |
| 1 | 0.083333 |
| 2 | 0.166666 |
| 3 | 0.249999 |
| 5 | 0.416665 |
| 10 | 0.83333 |
| 15 | 1.24999 |
| 20 | 1.66666 |
| 25 | 2.08332 |
| 50 | 4.16665 |
| 75 | 6.24997 |
| 100 | 8.3333 |
| 250 | 20.8332 |
| 500 | 41.6665 |
| 1000 | 83.333 |
| 5000 | 416.665 |
| 10000 | 833.33 |
Understanding Pounds per Foot
The Pound per Foot (symbol: lb/ft) is a unit of linear density. An imperial linear-density unit (≈ 1.4882 kg/m per NIST SP 811). The single most important imperial linear-density unit in US engineering because US structural-steel shapes are NAMED by their lb/ft mass per AISC convention: 'W14×90' designates a 14-inch nominal-depth wide-flange beam weighing exactly 90 lb/ft (the second number is always the lb/ft mass). The AISC Steel Construction Manual lists every rolled-steel shape — W, S, M, HP, HSS, C, MC, L, WT, MT — by its lb/ft nominal weight. Also the universal unit for oil-country tubular goods (OCTG) casing and tubing per API 5CT (a typical 5-1/2 inch OD production tubing is 17 lb/ft; 9-5/8 inch OD intermediate casing is 47 lb/ft), petroleum pipeline specifications per API 5L (a 30-inch OD crude-oil pipeline at 0.5-inch wall is ~158 lb/ft), and marine anchor-chain ratings per ABS / DNV (3-inch stud-link anchor chain ~90 lb/ft). Convert lb/ft to kg/m by multiplying by 1.4882; to lb/in by dividing by 12.
It belongs to the imperial measurement system.
Pounds per Foot are commonly used in textile manufacturing, cable engineering, and structural analysis.
Understanding Pounds per Inch
The Pound per Inch (symbol: lb/in) is a unit of linear density. An imperial linear-density unit equal to exactly 12 × lb/ft (≈ 17.858 kg/m per NIST SP 811). lb/in is used occasionally in US engineering for small-cross-section components where lb/ft would produce small decimal values: small US-manufactured precision-machined wire (round bar stock from McMaster-Carr / MSC Industrial Supply lists weight-per-inch for small diameters), specialty tooling (broaches, taps, drills, gun-barrel stock), small structural sections in MIL-SPEC aerospace and defense applications (MIL-STD-1539 microelectronics-package mass-spec sheets, occasional small-airframe spar-cap weight-per-inch in legacy aircraft drawings), and some pre-1980s machine-shop reference tables. 1 lb/in = 12 lb/ft ≈ 17.86 kg/m. Much less common than lb/ft in everyday US structural engineering but persists in specialty tooling, fastener-stock, and small-arms ammunition projectile-weight specifications.
It belongs to the imperial measurement system.
Pounds per Inch are commonly used in textile manufacturing, cable engineering, and structural analysis.
Why Convert Pounds per Foot to Pounds per Inch?
Converting between Pounds per Foot and Pounds per Inch is a frequent requirement for engineers, scientists, and students working with linear density values. Different industries and regions favour different unit systems, so having a dependable conversion tool saves time and prevents errors in technical calculations. Whether you are verifying a specification sheet, cross-checking simulation results, or preparing a report for an international audience, accurate linear density conversion is essential.
Frequently Asked Questions
How do I convert Pounds per Foot to Pounds per Inch?
An imperial linear-density unit (≈ 1. To convert Pounds per Foot to Pounds per Inch, multiply by 0.083333. For example, 25 lb/ft equals 2.08332 lb/in.
How many Pounds per Inch are in 1 Pound per Foot?
There are 0.083333 Pounds per Inch in 1 Pound per Foot.
How many Pounds per Foot are in 1 Pound per Inch?
There are 12.0001 Pounds per Foot in 1 Pound per Inch.
What is the formula for Pound per Foot to Pound per Inch conversion?
The formula is: multiply by 0.083333. This means 1 lb/ft = 0.083333 lb/in.
Is a Pound per Foot bigger than a Pound per Inch?
Yes. One Pound per Foot is larger than one Pound per Inch because 1 lb/ft equals 0.083333 lb/in, which is less than 1.
When do you need to convert between Pounds per Foot and Pounds per Inch?
An imperial linear-density unit equal to exactly 12 × lb/ft (≈ 17. Pound per Foot and Pound per Inch are both linear density units, so conversion comes up whenever one source of information uses one unit and another uses the other — a classic cross-reference challenge in engineering, trade, travel, and everyday life.