Convert Pounds per Inch to Pounds per Foot
Instantly convert Pounds per Inch (lb/in) to Pounds per Foot (lb/ft) with our free online calculator.
Formula: lb/in to lb/ft — multiply by 12.0001
Reference Table
| Pounds per Inch (lb/in) | Pounds per Foot (lb/ft) |
|---|---|
| 1 | 12.0001 |
| 5 | 60.0003 |
| 10 | 120.001 |
| 25 | 300.001 |
| 50 | 600.003 |
| 100 | 1200.01 |
How to Convert Pounds per Inch to Pounds per Foot
Formula
To convert Pounds per Inch (lb/in) to Pounds per Foot (lb/ft): multiply by 12.0001
Step-by-Step
- Start with your value in Pounds per Inch (lb/in).
- Multiply by 12.0001 to perform the conversion.
- The result is your value expressed in Pounds per Foot (lb/ft).
Conversion Factor
1 lb/in = 12.0001 lb/ft
Reverse Factor
1 lb/ft = 0.083333 lb/in
Worked Example
Convert 25 Pounds per Inch to Pounds per Foot: 25 lb/in = 300.001 lb/ft
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.
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.
Quick Facts
- 1 Pound per Inch equals 12.0001 Pounds per Foot
- 1 Pound per Foot equals 0.083333 Pounds per Inch
- Pound per Inch is a unit of linear density
- Pound per Foot is a unit of linear density
- This conversion is commonly used in textile manufacturing, cable engineering, and structural analysis
- The Pound per Inch belongs to the imperial system
Common Pound per Inch to Pound per Foot Conversions
| Pounds per Inch (lb/in) | Pounds per Foot (lb/ft) |
|---|---|
| 0.01 | 0.120001 |
| 0.1 | 1.20001 |
| 0.25 | 3.00001 |
| 0.5 | 6.00003 |
| 1 | 12.0001 |
| 2 | 24.0001 |
| 3 | 36.0002 |
| 5 | 60.0003 |
| 10 | 120.001 |
| 15 | 180.001 |
| 20 | 240.001 |
| 25 | 300.001 |
| 50 | 600.003 |
| 75 | 900.004 |
| 100 | 1200.01 |
| 250 | 3000.01 |
| 500 | 6000.03 |
| 1000 | 12000.1 |
| 5000 | 60000.3 |
| 10000 | 120001 |
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.
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.
Why Convert Pounds per Inch to Pounds per Foot?
Converting between Pounds per Inch and Pounds per Foot 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 Inch to Pounds per Foot?
An imperial linear-density unit equal to exactly 12 × lb/ft (≈ 17. To convert Pounds per Inch to Pounds per Foot, multiply by 12.0001. For example, 25 lb/in equals 300.001 lb/ft.
How many Pounds per Foot are in 1 Pound per Inch?
There are 12.0001 Pounds per Foot in 1 Pound per Inch.
How many Pounds per Inch are in 1 Pound per Foot?
There are 0.083333 Pounds per Inch in 1 Pound per Foot.
What is the formula for Pound per Inch to Pound per Foot conversion?
The formula is: multiply by 12.0001. This means 1 lb/in = 12.0001 lb/ft.
Is a Pound per Inch bigger than a Pound per Foot?
No. One Pound per Inch is smaller than one Pound per Foot because 1 lb/in equals 12.0001 lb/ft, which is greater than 1.
When do you need to convert between Pounds per Inch and Pounds per Foot?
An imperial linear-density unit (≈ 1. Pound per Inch and Pound per Foot 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.