Mass converter
Convert kilograms, grams, pounds and ounces using international avoirdupois definitions.
Result for the values shown.
Calculations run in your browser.
What to enter
| Input | Meaning and units |
|---|---|
| Value | Enter value using the definition in the method and example. |
| From | Select the unit or currency in which the entered number is currently expressed. |
| To | Select the unit or currency you need for the answer. |
Understanding your result
The converted value describes the same mass quantity in the selected target unit. Display rounding does not add precision to the original measurement.
Common mistakes
- Confusing the source and target units, or overlooking a prefix or case-sensitive symbol.
- Confusing avoirdupois, troy and other explicitly different mass definitions.
Check your calculation
- Convert to the target unit and then reverse the direction. Within display rounding, you should recover the original value.
Read the mass measurement guide · Calculation checks, sources and review limits
How do I express this mass in another unit?
Enter the known mass value and choose its source and target units. The converter expresses the same quantity in the selected target unit.
Common uses
- Compare package or equipment masses.
- Translate ingredient weights between mass units.
How it works
The calculation passes through a shared base unit. Factors are stored centrally; calculations use floating-point arithmetic and display up to 12 significant digits. Keep extra precision until the final result.
Worked example
1 pound = 0.45359237 kilograms exactly.