Weight Converter
Convert a weight between milligrams, grams, kilograms, tonnes, ounces, pounds and stone. Converts instantly in your browser.
Also searched as: kg to lbs · lbs to kg · pounds to kg · grams to ounces
Updated November 6, 2026
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How to use it
- 1
Enter a value
Type the weight you want to convert.
- 2
Pick the units
Choose what to convert from and to.
- 3
Read the result
The answer updates as you type.
Questions about weight converter
Is this weight or mass?
In everyday terms these are used interchangeably; the tool converts the common units people call weight.
Does it support stone?
Yes, stone is included alongside metric and other imperial units.
Is anything uploaded?
No, the conversion runs on your device.
Mass units and how they relate
Grams and kilograms are metric, with 1,000 grams in a kilogram and 1,000 kilograms in a tonne. The pound and ounce belong to the imperial and US customary systems: 16 ounces make a pound, and 14 pounds make a stone, the unit still used for body weight in the UK and Ireland. A tonne here means the metric tonne of 1,000 kg, not the 2,000-pound US short ton.
Strictly, kilograms and pounds measure mass, while weight is the pull of gravity on that mass. Scales, recipes and luggage limits use the two words interchangeably, and this converter handles the units you read on those labels.
| One of… | Kilograms (kg) | Pounds (lb) | Ounces (oz) |
|---|---|---|---|
| Milligrams (mg) | 0.000001 | 0.000002205 | 0.00003527 |
| Grams (g) | 0.001 | 0.002205 | 0.03527 |
| Kilograms (kg) | 1 | 2.205 | 35.27 |
| Tonnes (t) | 1,000 | 2,205 | 35,270 |
| Ounces (oz) | 0.02835 | 0.0625 | 1 |
| Pounds (lb) | 0.4536 | 1 | 16 |
| Stone (st) | 6.35 | 14 | 224 |
Worked examples and tips
A 20 kg luggage allowance is about 44.09 lb. A 150 lb person is about 68.04 kg, and 12 stone is about 76.2 kg.
In the kitchen, 1 ounce is about 28 grams and 1 pound is about 454 grams. Weighing ingredients is more accurate than measuring by volume, so convert the weight itself rather than guessing how many cups it makes.