Weight (mass) converter
ConvertersConvert between kilograms, grams, pounds and ounces instantly.
Your results
Convert between kilograms, grams, pounds and ounces.
How masses are converted
We use the kilogram as a reference. Each value is converted to kg and from there we derive the other units with standard factors.
Weight or mass
In everyday language we say weight, but technically these units measure mass. The difference matters only in scientific contexts.
Frequently asked questions
Answers to the most common questions about this tool.
Which units can I convert?
Choose from the units available in this converter.
How accurate is the conversion?
It uses standard conversion factors between the selected units.
How should I round the result?
Round only to the level of precision required by your recipe, work, or measurement.
How do I enter a value to convert?
Enter a value, then select the source and destination units.
Can I use decimal values?
Yes, provided the value is valid for the selected unit.
Sources and methodology
Methodology: Mass conversion
Converts grams, kilograms, pounds, and ounces using kilogram as reference.
It displays “weight” in everyday use although the units are mass.
References
Last reviewed
July 15, 2026