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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: 2026-05-21.
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.
pound (troy) [lb t]
Definition
The pound (troy) (lb t) is a weight unit used to express measurements in this converter.
History
This unit is included because it appears in practical measurement systems, technical references, product specifications, or everyday conversion needs.
Current use
Use pound (troy) when comparing weight values, checking specifications, converting between systems, or preparing quick estimates.