Unit Converters Tool

Weight (Avoirdupois)

Convert between pounds, ounces, drams, grains, and stones in the traditional Avoirdupois system.

Σ The Formula

Value × FactorA / FactorB

Real World Examples

Cooking
1 Pound = 16 Ounces
Precision
1 Pound = 7,000 Grains
Heavy Duty
1 Stone = 14 Pounds

# About This Calculator

The Avoirdupois system is the standard system of weights used in the United States and (historically) the British Empire for almost all goods except precious metals and gems. It is based on a pound of 16 ounces.

The system's name comes from the Old French phrase aveir de peis, meaning "goods of weight." While most of the world has moved to the metric system (Grams/Kilograms), the Avoirdupois system remains the dominant standard in US commerce, shipping, and household measurements.

This converter handles common units like Pounds and Ounces, as well as more specialized units like Grains (used in ammunition and medication) and Drams.

How To Use

  1. Enter the weight you wish to convert.
  2. Select the source unit from the **From** dropdown.
  3. Select the target unit from the **To** dropdown.
  4. The result will show the converted value and the pound-based normalization steps.

Frequently Asked Questions

What is the difference between Avoirdupois and Troy weight?+

Avoirdupois is for general goods. Troy weight is used for precious metals (Gold, Silver). An Avoirdupois pound is 7,000 grains, while a Troy pound is lighter at 5,760 grains.

Is an ounce always 1/16 of a pound?+

In the Avoirdupois system, yes. In the Troy system, there are 12 ounces to a pound, and those ounces are slightly heavier than Avoirdupois ounces.

What is a 'Stone'?+

A stone is a unit of weight equal to 14 pounds. It is still commonly used in the UK and Ireland to measure human body weight.

Is Weight (Avoirdupois) free to use?+

Yes, Weight (Avoirdupois) on Matheric is completely free to use. We believe in accessible education and utility for everyone.

How accurate is Weight (Avoirdupois)?+

We use standard mathematical formulas and high-precision computing algorithms to ensure results for Weight (Avoirdupois) are accurate for academic and professional use.

Can I use Weight (Avoirdupois) on my phone?+

Yes! Weight (Avoirdupois) is fully responsive and optimized for all devices, including smartphones, tablets, and desktops.

About

The Avoirdupois system is the standard system of weights used in the United States and (historically) the British Empire for almost all goods except precious metals and gems. It is based on a pound of 16 ounces.

The system's name comes from the Old French phrase aveir de peis, meaning "goods of weight." While most of the world has moved to the metric system (Grams/Kilograms), the Avoirdupois system remains the dominant standard in US commerce, shipping, and household measurements.

This converter handles common units like Pounds and Ounces, as well as more specialized units like Grains (used in ammunition and medication) and Drams.

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