Methodology
How this calculator works
Values are converted to kilograms using standards-based mass factors, then divided by the selected target factor. The pound is the international avoirdupois pound defined as exactly 0.45359237 kilograms.
Formula testedEveryday Converters
Weight Converter
Convert kilograms, pounds, ounces, stone and three distinct ton definitions with clear unit labels and a complete equivalent table.
Unit conversion calculator
Convert weight and mass
Convert metric, avoirdupois, stone and US or Imperial ton measurements without mixing unit definitions.
Your value stays in this browser and is only used for this calculation.
Converted weight
Ready to convert
Enter a value, check both unit labels and choose Convert units.
Worked example
Reading the result
A mass of 70 kilograms is approximately 154.323584 pounds or 11.0231 stone. Changing display precision affects presentation only.
Weight conversion guide
Distinguish pounds, stone and tons
Pounds and ounces here use the everyday avoirdupois system. The table labels each ton explicitly because a metric tonne, US short ton and Imperial long ton represent different masses.
Standards reference
Use a defined kilogram relationship
NIST conversion tables identify the avoirdupois pound relationship and distinguish measurement systems used in general and commercial conversion work.
NIST SI conversion footnotesRelated conversion tools
Convert another measurement
Common questions
Frequently asked questions
How many pounds are in one kilogram?+
One kilogram equals approximately 2.20462262185 avoirdupois pounds.
Is a tonne the same as a US ton?+
No. A metric tonne is 1,000 kilograms, a US short ton is 907.18474 kilograms, and an Imperial long ton is 1,016.0469088 kilograms.
How many pounds are in one stone?+
One stone equals exactly 14 avoirdupois pounds, or 6.35029318 kilograms.
Does this convert force or mass?+
The listed units are mass units used in everyday weight measurements. Force units such as newtons are outside this calculator's scope.
Are the displayed decimals used in later conversions?+
No. The engine uses the full stored factor and only rounds when formatting the result.
Important scope
This converter handles mass units commonly called weight in everyday use. It does not calculate gravitational force, troy weight or precious-metal units. Confirm whether a document uses metric tonne, US short ton or Imperial long ton.