Units of Weight

Team Physics - Examples.com
Created by: Team Physics - Examples.com, Last Updated: April 25, 2024

Units of Weight

Weight is a measurement that quantifies the force exerted by gravity on an object. This fundamental concept is crucial across various fields, from everyday grocery shopping to scientific research in physics and engineering.

What are Units of Weight?

Weight is measured using several distinct units, each integral to various aspects of daily and professional life. Kilograms (kg) and grams (g) are foundational in the metric system, commonly used worldwide in commerce, science, and personal weight measurement.

Transitioning to the imperial system, particularly prevalent in the United States, pound (lb) and ounce (oz) serve key roles in industries ranging from food service to postal operations.

SI Unit of Weight


The SI unit of weight is technically the newton, as weight is a measure of force; however, in everyday contexts, we often refer to kilogram when discussing the ‘weight’ of an object. This common practice arises because weight is the force exerted by gravity on an object, and kilograms are actually a unit of mass.

CGS Unit of Weight


In the CGS (centimeter-gram-second) system, the unit used to measure weight (force) is the dyne. However, for practical purposes, especially when referring to mass (which is often colloquially referred to as weight), the gram (g) is commonly used. The dyne is defined as the force required to accelerate a mass of one gram at a rate of one centimeter per second squared.

List of Weight Units

List of Weight Units
Metric tont
Imperial tonlong ton
US tonshort ton

Kilogram (kg)

1 kg

The kilogram is the SI unit of mass, used globally in almost all fields including science, industry, and everyday commerce. It represents the mass that is accelerated by 1 meter per second squared when a force of one newton is applied.

Pound (lb)

1 lb ≈ 0.453592 kg

A pound is a unit of weight used primarily in the United States and other regions still utilizing the imperial system. It is commonly used in commerce, personal weight measurement, and in the packaging of food products.

Ounce (oz)

1 oz = 1/16 lb ≈ 28.3495 g

An ounce is another imperial unit of weight often used in the United States, especially in cooking and postal services for measuring smaller weights.

Gram (g)

1 g = 0.001 kg

The gram is a unit of mass within the metric system, widely used in scientific contexts to measure small quantities due to its precision.

Metric Ton (t)

1 t = 1000 kg

Also known as a tonne, the metric ton is used worldwide, particularly in industry and commerce, to measure large quantities of materials, such as in mining and large-scale manufacturing.

Stone (st)

1 st = 6.35029 kg

The stone is a unit of weight traditionally used in the UK and Ireland for body weight measurement. It is still commonly used in those regions despite the official adoption of the metric system.

Imperial Ton (long ton)

1 long ton = 1016.05 kg

The imperial ton, also known as the long ton, is used predominantly in the United Kingdom and is defined as 2,240 pounds.

US Ton (short ton)

1 short ton = 907.185 kg

The US ton, or short ton, is commonly used in the United States, equal to 2,000 pounds. It is prevalent in industries such as shipping and raw materials.

Conversion of Weight Units

Conversion of Weight Units

Here’s a conversion table for various units of weight, including Kilogram (kg), Pound (lb), Ounce (oz), and Metric Ton (t). The values provided are conversion factors for converting one unit into another:

UnitKilogram (kg)Pound (lb)Ounce (oz)Metric Ton (t)
Kilogram (kg)12.2046235.2740.001
Pound (lb)0.4535921160.000453592
Ounce (oz)0.02834950.062510.0000283495
Metric Ton (t)10002204.62352741

Kilograms to Pounds

  • Conversion: 1 pound (lb) = 0.453592 kilograms (kg).
  • Example: To convert 10 kg to pounds, divide by 0.453592.
    10 kg / 0.453592 ≈ 22.046 lb

Kilograms to Ounces

  • Conversion: 1 ounce (oz) = 0.0283495 kilograms (kg).
  • Example: To convert 5 kg to ounces, divide by 0.0283495.
    5 kg / 0.0283495 ≈ 176.37 oz

Pounds to Kilograms

  • Conversion: 1 kilogram (kg) = 2.20462 pounds (lb).
  • Example: To convert 20 lb to kilograms, divide by 2.20462.
    20 lb / 2.20462 ≈ 9.072 kg

Pounds to Ounces

  • Conversion: 1 ounce (oz) = 1/16 pound (lb).
  • Example: To convert 3 lb to ounces, multiply by 16.
    3 lb × 16 = 48 oz

Ounces to Kilograms

  • Conversion: 1 kilogram (kg) = 35.274 ounces (oz).
  • Example: To convert 100 oz to kilograms, divide by 35.274.
    100 oz / 35.274 ≈ 2.835 kg

Ounces to Pounds

  • Conversion: 1 pound (lb) = 16 ounces (oz).
  • Example: To convert 32 oz to pounds, divide by 16.
    32 oz / 16 = 2 lb

Metric Ton to Kilograms

  • Conversion: 1 metric ton (t) = 1000 kilograms (kg).
  • Example: To convert 2 metric tons to kilograms, multiply by 1000.
    2 t × 1000 = 2000 kg

Metric Ton to Pounds

  • Conversion: 1 pound (lb) = 0.000453592 metric tons (t).
  • Example: To convert 1 metric ton to pounds, divide by 0.000453592.
    1 t / 0.000453592 ≈ 2204.62 lb

Kilograms to Metric Tons

  • Conversion: 1 metric ton (t) = 1000 kilograms (kg).
  • Example: To convert 1500 kg to metric tons, divide by 1000.
    1500 kg / 1000 = 1.5 t


What is the basic metric unit of weight?

The kilogram (kg) serves as the basic metric unit of weight, widely adopted globally for various measuring purposes in commerce and science.

What is the largest unit of measurement for weight?

The metric ton, or tonne, stands as the largest standard unit for measuring weight, especially used for heavy, bulk goods in shipping and industry.

What is the smallest unit of weight?

The milligram (mg) is recognized as the smallest standard unit of weight, used extensively in pharmaceuticals, science, and nutrition for precise measurements.

AI Generator

Text prompt

Add Tone

10 Examples of Public speaking

20 Examples of Gas lighting