Weight & Mass Converter
Free online weight & mass converter — convert between Milligram, Gram, Kilogram, Tonne and more, instantly in your browser.
All conversions
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How this weight converter works
Type a value, pick the unit you have and the unit you want — the result updates instantly, along with a full table converting your value into every supported weight unit. All math runs locally in your browser, so it works offline once loaded and nothing you enter is sent anywhere.
Supported units
- Milligram (mg)
- Gram (g)
- Kilogram (kg)
- Tonne (t)
- Ounce (oz)
- Pound (lb)
- Stone (st)
Frequently asked questions
How do I convert Milligram to Gram?
Enter your value, pick Milligram as “From” and Gram as “To” — the result updates as you type. 1 Milligram = 0.001 Gram.
Which weight units does this converter support?
7 units: Milligram, Gram, Kilogram, Tonne, Ounce, Pound, Stone. The table below the converter shows your value in every unit at once.
Is this weight converter free and private?
Yes — it is completely free, needs no sign-up, and all conversion happens locally in your browser. Nothing you enter is uploaded or stored.