About this tool
Convert kilograms, pounds, ounces, grams, tonnes and stone. The conversion runs instantly in your browser and displays a practical precision without sending entered values to a server.
How to use
- 1Enter the value you need to convert.
- 2Choose the source and destination units.
- 3Read the result or swap the units to reverse the conversion.
Benefits
- Uses documented standard conversion factors.
- Updates immediately as values change.
- Works locally without an upload.
Distinguish everyday weight units from physical mass and force
Practical example
One international avoirdupois pound equals exactly 0.45359237 kilograms. A recipe ounce is not automatically the same as a fluid ounce, which measures volume.
Interpreting the result
Confirm whether the source uses kilograms, pounds, stone or metric tonnes and label the result. For shipping, compare converted mass with the carrier’s dimensional-weight rules separately.
Limits and common mistakes
The calculator does not convert volume to mass without material density. Precious metals, historical units and force measurements can use definitions outside this common-unit set.
Frequently asked questions
Why can the last decimals differ from another calculator?+
Displayed precision and rounding can vary, while the underlying standard factor remains the same.
Can I enter negative or decimal values?+
Yes. Negative values are meaningful for some measurements such as temperature; use context for other units.