Weights and Measures Tables

Key Equivalencies:

1. 1 ounce = 28 grams​
2. 1 pound = 16 ounces.
3. 1 pound = approximately 1/2 kilogram.
4. 1 kilogram = 1,000 grams.
5. 1 kilogram = 2.2 pounds.

The unit of measurement for weight is that of force, which in the International System of Units (SI) is the newton. For example, an object with a mass of one kilogram has a weight of about 9.8 newtons on the surface of the Earth, and about one-sixth as much on the Moon.

For example, if an object weighs 5 pounds, divide it by 2.20462262 to get 2.6796. If you need a general number, rather than an exact number, you can divide the number of pounds by 2.2. Multiply the number of inches by 2.54 to convert it to centimeters.

A conversion factor is an expression for the relationship between units that is used to change the units of a measured quantity without changing the value. A conversion ratio (or unit factor) always equals one (1), where the numerator and the denominator have the same value expressed in different units.

The Metric System of Measurements uses the mass units: gram (g), kilogram (kg) and tonne (t).

Weight is the result of gravity acting on mass: w = mg. The value of g on Earth’s surface is 9.8 m/s3 with units of acceleration. To find the weight of something, simply multiply its mass by the value of the local gravitational field, and you get a result in newtons (N).

The Weights and Measures Division promotes uniformity in U.S. weights and measures laws, regulations, and standards to achieve equity between buyers and sellers in the marketplace.

Units of Mass (Weight)

Summary

1. Weight is a measure of the force of gravity pulling down on an object. It depends on the object’s mass and the acceleration due to gravity, which is 9.8 m/s2 on Earth.
2. The formula for calculating weight is F = m × 9.8 m/s2, where F is the object’s weight in Newtons (N) and m is the object’s mass in kilograms.

Pounds to Kilograms conversion table