Convert Pound-Force to Long Ton-Force
Convert Pound-Force (lbf) to Long Ton-Force (tf (UK)) instantly and accurately.
Conversion Formula
tf (UK) = lbf × 0.0004464285714
About Pound-Force
The pound-force (lbf) is the gravitational force on 1 lb-mass under standard gravity - exactly 4.4482216152605 N. It dominates US structural, mechanical, and aerospace engineering: AISC and ACI structural codes use lbf and kips (1 kip = 1,000 lbf); tire pressure 'psi' means lbf/in²; engine torque in lb·ft. Aircraft thrust is quoted in lbf: the GE90-115B (Boeing 777) produces 115,300 lbf = 513 kN. Spring rates, fastener torques, and load cell calibrations across North America are in lbf. 1 lbf = 4.44822 N = 16 ozf = 32.174 pdl.
About Long Ton-Force
One long ton-force is the gravitational force on an imperial long ton (2,240 lb = 20 × 112 lb hundredweight) - approximately 9,964 N. The long ton was the traditional British ton; long ton-force appears in Royal Navy vessel displacement records, British Admiralty anchor chain standards, pre-metrication UK bridge live load codes, and Australian/South African mining bolt pull-out specifications. It sits between short ton-force (8,896 N) and metric tonne-force (9,807 N) - about 12% heavier than a short ton-force. 1 long tf = 2,240 lbf = 9,964.02 N.
Quick Reference Table
| Pound-Force (lbf) | Long Ton-Force (tf (UK)) |
|---|---|
| 1 lbf | 0.000446429 tf (UK) |
| 2 lbf | 0.000892857 tf (UK) |
| 5 lbf | 0.00223214 tf (UK) |
| 10 lbf | 0.00446429 tf (UK) |
| 25 lbf | 0.0111607 tf (UK) |
| 50 lbf | 0.0223214 tf (UK) |
| 100 lbf | 0.0446429 tf (UK) |