What the result means
The converter expresses the same mass in a different unit; it does not change the underlying quantity. Exact conversion factors are used internally, while the displayed number may be rounded for readability.
Conversions
Weight Converter
Convert milligrams, grams, kilograms, ounces, pounds and metric tonnes.
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How this calculation works
Convert milligrams, grams, kilograms, ounces, pounds and metric tonnes. Enter your values, select Calculate, then review the result. You can change any value and calculate again.
Formula used
target = value × source factor in kilograms ÷ target factor in kilograms
Good to know
Results are estimates for informational purposes.
Example calculation
1 kg ÷ 0.45359237 kg/lb = 2.204622622 lb
A practical accuracy check
Convert back to the source unit. Apart from display rounding, the original mass should return; 1 lb is exactly 0.45359237 kg.
Assumptions and limits
Mass and force are different physical quantities, and a US ton is not a metric tonne. Confirm the source unit before entering a value and avoid treating a rounded converted number as more precise than the original measurement.
Using the result responsibly
For shipping, recipes or scientific work, write the unit beside every value and retain enough decimals for the task. Convert back once as a reasonableness check when an error would affect cost, dosage or compliance.
A relevant comparison to try
For shipping, retain the original scale reading and unit, convert once, then round only to the carrier’s required precision.
How to use this calculator
- Enter your values, select Calculate, then review the result. You can change any value and calculate again.
- Check units and time periods before comparing two results.
- Change one input at a time to understand its effect.
Frequently asked questions
What does the Weight Converter calculate?
Convert milligrams, grams, kilograms, ounces, pounds and metric tonnes. The result is calculated from the values you enter and the formula shown on this page.
Which assumptions does the Weight Converter use?
It applies target = value × source factor in kilograms ÷ target factor in kilograms. Values, fees, rules or timing not represented by an input are not added automatically.