shipping and freightbody and fitness measurementsfood and grocery quantitiesproduct specifications
Sources and Accuracy
Weight and mass conversions use kilogram as the reference unit. Common factors include 1 pound = 0.45359237 kilogram and 1 ounce = 0.028349523125 kilogram.
Displayed results are rounded for readability. The calculator keeps enough precision for everyday use and switches to scientific notation for very large or very small values. Last reviewed: 2026-08-14.
About These Units
kilogram [kg]
Definition
The kilogram is the SI base unit of mass and is the reference unit for the weight and mass converter.
History
The kilogram was historically tied to a physical prototype and is now defined using the Planck constant.
Current use
Kilograms are used for body weight, groceries, shipping, science, medicine, fitness, and commercial weighing.
gram [g]
Definition
The gram is a metric mass unit equal to one thousandth of a kilogram.
History
Grams are part of the metric system and became common for small everyday weights.
Current use
Grams are used for food, nutrition, recipes, lab samples, postage, jewelry, and product labels.
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How to Convert
Enter the value in the “From value” field.
Confirm the source unit is kilogram [kg].
Confirm the target unit is gram [g].
Read the instant result and formula.
Where This Conversion Is Used
shipping and freightbody and fitness measurementsfood and grocery quantitiesproduct specifications