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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
pound [lb]
Definition
The pound is a US customary and imperial mass unit equal to exactly 0.45359237 kilograms.
History
The avoirdupois pound became the standard pound for general weight measurement in the modern yard-pound system.
Current use
Pounds are common for body weight, shipping, food labels, gym equipment, and consumer products in the United States.
nanogram [ng]
Definition
The nanogram (ng) 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 nanogram when comparing weight values, checking specifications, converting between systems, or preparing quick estimates.