How it works
result = amount × source factor ÷ destination factor. Factors are relative to kg.
Input definitions
- Amount
- Enter the value in the labeled unit.
- From unit
- Choose kg / g / lb / oz / stone / metric tonne / US ton / long ton.
- To unit
- Choose kg / g / lb / oz / stone / metric tonne / US ton / long ton.
A worked example
- Amount
- 1000
- From unit
- kg
- To unit
- g
Assumptions & limits
IEEE 754 internally; 6 decimals by default. International foot/pound and US/Imperial volume definitions. No mass-volume inference.
Sources & review
Maintained by AnsRio. Methods and examples use automated checks; this does not imply independent professional certification.
Method updated 2026-10-17. Content checked against the stated method and examples. Our verification approach.
Common questions
Why can a converted result differ in its last digits?
Display rounding and approximate measured unit factors can affect the final digits. Select more decimal places when available, and check that both tools use the same unit definition.
How does the Mass converter tool work?
result = amount × source factor ÷ destination factor. Factors are relative to kg.
What are the assumptions and limits of Mass converter?
IEEE 754 internally; 6 decimals by default. International foot/pound and US/Imperial volume definitions. No mass-volume inference.