# Stones to Troy Pounds (st to lb t)

Source: https://www.unitconvertercalculator.com/weight/stones-to-troy-pounds/

**1 st = 17.013888888889 lb t**

One stone equals approximately 17.01 troy pounds. Since the troy pound (373.24 grams) is lighter than the avoirdupois pound (453.59 grams), a stone of 14 avoirdupois pounds converts to more than 14 troy pounds. This counterintuitive result is a hallmark of the English two-pound system.

## Formula

Apply the conversion factor

## Conversion Table

| Stones (st) | Troy Pounds (lb t) |
|---|---|
| 0.1 st | 1.7013888888889 lb t |
| 0.25 st | 4.2534722222222 lb t |
| 0.5 st | 8.5069444444444 lb t |
| 1 st | 17.013888888889 lb t |
| 2 st | 34.027777777778 lb t |
| 5 st | 85.069444444444 lb t |
| 8 st | 136.11111111111 lb t |
| 10 st | 170.13888888889 lb t |
| 14 st | 238.19444444444 lb t |
| 20 st | 340.27777777778 lb t |
| 25 st | 425.34722222222 lb t |
| 50 st | 850.69444444444 lb t |
| 100 st | 1701.3888888889 lb t |

## Units

### Stone (st)

A British unit of mass equal to 14 pounds or approximately 6.35 kilograms. Commonly used in the UK and Ireland for body weight.

### Troy Pound (lb t)

A troy pound equals 12 troy ounces or 5,760 grains (373.2417216 grams). It is lighter than the avoirdupois pound and is rarely used today outside of historical contexts.

## Background

Historical mint records documenting silver or gold coinage in troy pounds can be compared with raw material weights expressed in stones. A stone of silver (17.01 troy pounds) would produce approximately 4,082 silver pennies at one pennyweight each.

## Good to Know

The stone-troy-pound conversion is where the British imperial system's most beloved unit meets its most confusing feature. The stone is cherished by millions of British people who know their weight in no other unit. The troy pound is an obsolete curiosity known mainly to measurement historians. Their conversion produces the bewildering result that 14 of one pound equals 17 of another, a mathematical fact that has confused students, merchants, and monarchs for over 500 years.

## FAQ

### How many troy pounds are in one stone?

One stone equals approximately 17.01 troy pounds. This is 6,350 grams divided by 373.24 grams per troy pound.

### Why is this more than 14?

Because the troy pound is lighter than the avoirdupois pound. The same physical mass (6,350 grams) contains more of the lighter troy pounds than the heavier avoirdupois pounds that define the stone.

### Is the troy pound still used?

The troy pound is essentially obsolete. Modern precious metals trade uses troy ounces. This conversion is relevant only for historical research and measurement education.

## Non-Frequently Asked Questions

### If 14 avoirdupois pounds equals 17 troy pounds, which pounds are heavier?

Avoirdupois pounds are heavier (453.59 g versus 373.24 g for troy). This is why 14 heavier pounds equal 17 lighter pounds: same total mass, different unit sizes. The confusion is precisely why the metric system's single, unambiguous kilogram is preferred internationally.

### How many silver pennies could a stone of silver produce?

A stone of silver (17.01 troy pounds x 240 pennies per troy pound) would produce approximately 4,082 silver pennies. In medieval England, this represented a significant amount of currency, roughly equivalent to a skilled craftsman's wages for several years.

### Is the stone-troy-pound conversion the most confusing on this site?

It competes for the title with every other conversion that involves two different definitions of 'pound.' The English measurement system's decision to give the same name to two different masses is perhaps the single most confusing design choice in the history of measurement, and every stone-to-troy-pound conversion forcefully reminds us of this fact.

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## See Also

- [Troy Pounds to Stones](https://www.unitconvertercalculator.com/weight/troy-pounds-to-stones/)