# Slugs to Long Tons (slug to long tn)

Source: https://www.unitconvertercalculator.com/weight/slugs-to-long-tons/

**1 slug = 0.014363414595923 long tn**

One slug equals approximately 0.01436 long tons, meaning about 69.6 slugs make one long ton. The long ton's 2,240 pounds dwarfs the slug's 32.174 pounds by a factor of nearly 70. This conversion connects the engineering physics mass unit with the British naval tonnage standard.

## Formula

Apply the conversion factor

## Conversion Table

| Slugs (slug) | Long Tons (long tn) |
|---|---|
| 1 slug | 0.014363414595923 long tn |
| 2 slug | 0.028726829191845 long tn |
| 5 slug | 0.071817072979613 long tn |
| 10 slug | 0.14363414595923 long tn |
| 20 slug | 0.28726829191845 long tn |
| 50 slug | 0.71817072979613 long tn |
| 100 slug | 1.4363414595923 long tn |
| 200 slug | 2.8726829191845 long tn |
| 500 slug | 7.1817072979613 long tn |
| 1000 slug | 14.363414595923 long tn |
| 5000 slug | 71.817072979613 long tn |

## Units

### Slug (slug)

A slug is a unit of mass in the imperial system used in physics and engineering. It equals approximately 14.593903 kilograms, derived from the pound-force, standard gravity, and the foot.

### Long Ton (long tn)

A long ton (imperial ton) is a unit of mass equal to exactly 2,240 pounds or 1,016.0469088 kilograms. It is used primarily in the United Kingdom for shipping and naval displacement.

## Background

Naval engineers historically specified ship displacement in long tons and calculated dynamic forces using slugs. Converting between them was a routine step in warship design calculations during the era when the Royal Navy used imperial units.

## Good to Know

The slug-long-ton conversion links two pillars of British imperial engineering: the physicist's mass unit and the navy's displacement unit. During the era of British naval supremacy, warship designers worked across these scales daily, calculating how many slugs of shell and propellant a ship could carry within its long-ton displacement budget. The conversion factor of 69.6 was an invisible but essential constant in the mathematics of empire.

## FAQ

### How many slugs are in one long ton?

One long ton contains approximately 69.62 slugs. This is 2,240 pounds divided by 32.174 pounds per slug.

### How do I convert slugs to long tons?

Multiply slugs by 0.01436. For example, 100 slugs equals about 1.436 long tons.

### When was this conversion historically used?

In British naval engineering during the 19th and early 20th centuries, when ship displacement was specified in long tons and structural calculations used slug-based dynamics.

## Non-Frequently Asked Questions

### How many slugs was HMS Victory?

HMS Victory displaced about 3,500 long tons, which equals roughly 243,670 slugs. Nelson's flagship had a lot of inertia, which is partly why sailing ships took so long to change course, a fact that had significant tactical implications at the Battle of Trafalgar.

### Is the slug-long-ton conversion still used in naval engineering?

Modern naval engineering has largely converted to metric units (kilograms and metric tons). The slug-long-ton conversion survives primarily in historical analysis of pre-metric warship designs and in the archives of the Royal Navy's engineering departments.

### Could a slug of seawater affect a ship's displacement?

One slug of seawater (about 14.6 liters) added to a ship would increase its displacement by 0.01436 long tons, or about 32 pounds. On a 10,000-long-ton warship, this is a 0.00014 percent change, roughly equivalent to one sailor sneezing overboard. Ships tolerate considerably larger fluctuations from fuel consumption and cargo loading.

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## See Also

- [Long Tons to Slugs](https://www.unitconvertercalculator.com/weight/long-tons-to-slugs/)