What is the Weight Converter?
Convert any weight unit to all others at once — mg, g, kg, t, oz, lb, st. Weight and mass conversions matter for cooking, shipping, fitness tracking, medicine and trade. Every conversion uses the exact internationally defined factor, so results are precise to 12 significant digits.
How to use the Weight Converter
- Enter your value, your from unit.
- Results update automatically as you type; you can also press Calculate.
- Read the output: milligram (mg), gram (g), kilogram (kg), metric ton (t).
- Check the chart to see how the conversion scales.
Formula and method
Worked example
With value = 1, from unit = Milligram (mg), the Weight Converter returns milligram (mg): 1 mg; gram (g): 0.001 g; kilogram (kg): 0.000001 kg.
Tips for better results
- Double-check which system a unit belongs to (for example US vs UK gallons).
- Use the swap button to convert in the opposite direction instantly.
- Bookmark the conversions you use most — each pair has its own page.
Frequently asked questions
What does the Weight Converter do?
Convert any weight unit to all others at once — mg, g, kg, t, oz, lb, st.
How is it calculated?
The Weight Converter uses this method: value in target = value × (factor of source ÷ factor of target).
Can you show an example?
With value = 1, from unit = Milligram (mg), the Weight Converter returns milligram (mg): 1 mg; gram (g): 0.001 g; kilogram (kg): 0.000001 kg.
Is the Weight Converter accurate?
Yes. It uses standard formulas and exact constants, and the results are verified by our automated test suite. Values are displayed to up to 12 significant digits.
Is this tool free and private?
Yes — the Weight Converter is completely free with no sign-up, and it runs entirely in your browser, so the values you enter are never uploaded to our servers.
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