UK Ton-force to Kilonewton Converter

UK ton-force (long ton-force) is the force exerted by one long ton (2,240 pounds) under standard gravity.

Formula: 1 LTf = 2,240 lbf

Conversions:

• 1 LTf = 9,964.02 N (newtons)
• 1 LTf = 9.96402 kN (kilonewtons)
• 1 LTf = 2,240 lbf (pounds-force)
• 1 LTf = 1,016.05 kgf (kilogram-force)
• 1 LTf = 1.01605 metric ton-force
• 1 LTf = 1.12 US ton-force (short ton-force)

The UK ton-force is based on the long ton, part of the British imperial system. The long ton of 2,240 pounds (20 hundredweight of 112 pounds each) was the standard ton in the United Kingdom and Commonwealth countries for centuries. It was used extensively in British engineering, particularly in shipping (where "displacement tonnage" used long tons), structural engineering, and heavy industry. When the UK began metrication in 1965, the long ton was gradually replaced by the metric tonne (1,000 kg), though legacy equipment, old drawings, and historical documents still reference long ton-force. The unit persists in some traditional industries and historical contexts.

Historical British Engineering: Pre-1970s structural calculations and specifications.

Shipping Industry: Older ship displacement measurements, cargo capacity.

Legacy Equipment: Crane ratings, press capacity from British manufacturers.

Commonwealth Countries: Historical engineering documents in former British territories.

Archival Research: Understanding older technical drawings and specifications.