Choosing the right weight conversion
Everyday labels often say weight even when they report mass. Kilograms and grams are metric mass units; pounds and ounces are common in the United States and in several consumer contexts elsewhere.
Use an unrounded result when checking a luggage, parcel, or material limit. For personal tracking and recipes, a sensible displayed precision is usually more useful than a long string of decimals.
Common uses
- Airline luggage and shipping limits
- Body-weight records across countries
- Recipe and package quantities
In-depth weight conversion guides
These pages include page-specific scenarios, common mistakes, rounding guidance, sourced context, and a dated update record.
Quick weight utilities
These focused calculators provide a direct answer and the essential formula without requiring the longer background included in the in-depth guides.
Use converted values confidently
- One avoirdupois pound equals exactly 0.45359237 kilogram.
- Sixteen ounces make one avoirdupois pound.
- Confirm that an ounce means mass, not a fluid ounce.