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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Runs entirely in your browser — nothing you enter is uploaded or stored.
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.
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 shows your value in every unit at once.
Is this weight converter free and private?
Yes — completely free, no sign-up, and all conversion happens locally in your browser. Nothing you enter is uploaded or stored.