Avoirdupois Weight Conversion Calculator

The Avoirdupois Weight Calculator is an online tool designed to quickly and accurately convert weights between different units within the Avoirdupois system.

What is Avoirdupois weight system

The Avoirdupois weight system is a system of weights (or mass) that has been historically used in English-speaking countries. It is based on pounds (lb), ounces (oz), and grains (gr) as its primary units. The system has been largely standardized, and it is the most common weight system used in the United States and the United Kingdom for everyday measurements, particularly in the context of measuring the weight of goods and products.

Here is a brief overview of the main units in the Avoirdupois weight system and their relationships:

1 pound (lb) = 16 ounces (oz) 1 ounce (oz) = 16 drams (dr) 1 dram (dr) = 27.34375 grains (gr)

The Avoirdupois system is used primarily for weighing items that are not precious metals or gemstones. For these, the Troy weight system is typically used.

Nowadays, the metric system is becoming more prevalent worldwide, and many countries have officially adopted it as the standard for weights and measures. However, the Avoirdupois system is still widely used in the United States and to some extent in the United Kingdom.

Simplifying Weight Conversions with the Avoirdupois Weight Calculator

In today’s fast-paced world, it’s more important than ever to have access to accurate and convenient tools for measurement conversions. Among these tools, the Avoirdupois Weight Calculator stands out as a valuable resource for converting weights in the Avoirdupois system, which is commonly used in both the United States and the United Kingdom. In this blog post, we’ll explore the history of the Avoirdupois system, how the weight calculator works, and its applications in various industries.

History of the Avoirdupois System

The Avoirdupois system originated in France during the late Middle Ages and was later adopted by England in the 14th century. Over time, the system spread to other parts of the world, including the United States. The Avoirdupois system is primarily used to measure the weight of everyday items, such as produce, packaged goods, and precious metals. The system is based on the pound, which is divided into 16 ounces, and further subdivided into 16 drams.

Understanding the Avoirdupois Weight Calculator

The Avoirdupois Weight Calculator is an online tool designed to quickly and accurately convert weights between different units within the Avoirdupois system. The calculator takes the input weight and unit (e.g., pounds, ounces, drams) and converts it to the desired unit of measurement. Some calculators also allow users to convert between Avoirdupois and other weight systems, such as the metric system or the Troy weight system.

Using the Calculator

Utilizing the Avoirdupois Weight Calculator is simple:

  1. Select the input weight unit (e.g., pounds, ounces, or drams).
  2. Enter the weight value you’d like to convert.
  3. Choose the desired output unit.
  4. Click the “Convert” button.

The calculator will provide the converted weight in the desired unit, making it easy to compare or combine weights in different units.

Applications in Various Industries

The Avoirdupois Weight Calculator has numerous applications across a wide range of industries. Some common uses include:

  1. Retail and Grocery: Accurately weighing products to determine their price, ensuring that customers receive the correct amount of goods.
  2. Manufacturing: Precise weighing of raw materials and components to maintain product consistency and quality.
  3. Shipping and Logistics: Calculating the weight of packages to determine appropriate shipping costs and optimize transportation efficiency.
  4. Culinary and Baking: Converting ingredient measurements for recipes, ensuring consistency and accuracy in cooking and baking.
  5. Precious Metals and Jewelry: Accurately weighing precious metals, gemstones, and other valuable materials for valuation and trade.


The Avoirdupois Weight Calculator is an essential tool for anyone working with weights and measures within the Avoirdupois system. By providing quick and accurate conversions, this calculator simplifies tasks and increases efficiency in a wide range of industries. Whether you’re a retailer, manufacturer, or a home cook, the Avoirdupois Weight Calculator can help you save time and ensure accuracy in your weight measurements.

This online conversion calculator will convert among different avoirdupois units of weight or mass. 

Weight Converter

Conversion Table

Unit Name Unit Symbol Value in Pounds(lbs)
dram (avdp) dr 0.0625
grain (troy) gr 0.000142857
hundredweight (short) hwt 100
ounce (avdp) oz 0.0625
pound (avdp) lb 1
ton (short) ton 2000

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