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How to use
Use this online weight and mass converter for kg, lb, g, oz, stones, metric tonnes and US short tons. Convert kilograms to pounds, pounds to kilograms, grams to kilograms or metric tonnes to pounds through a kilogram base, while keeping metric tonnes separate from US short tons.
- Enter the mass and choose its source unit.
- Choose the target unit such as kg, lb, oz or stone.
- Calculate to see the selected result plus common kg, lb and gram equivalents.
How it is calculated
Example
Two direct examples: 1 kilogram = exactly 1,000 grams. For 70 metric tonnes to pounds, 70 tonnes = 70,000 kg, then 70,000 ÷ 0.45359237 ≈ 154,323.5835 lb.
Important notes
Scientifically these are mass units; weight is a force that depends on gravity. Everyday language often says 'weight', so both terms are used here. The international pound is exactly 0.45359237 kg and an ounce is exactly 1/16 lb.
Worked examples and interpreting results
Mass conversion preserves the amount of material: 2.5 kg equals 2500 g. The pound used here is exactly 0.45359237 kg, so 10 lb equals 4.5359237 kg.
| Case | Calculation | Result |
|---|---|---|
| Kilograms to grams | 2.5 × 1000 | 2,500 g |
| Ten pounds to kilograms | 10 × 0.45359237 | 4.535924 kg |
How to check the result
The displayed decimal may be rounded even when the conversion factor is exact. Kilograms measure mass and newtons measure force; relating them requires an assumed gravitational acceleration, not just a unit switch.
Kilograms to tonnes and pounds
A metric tonne equals exactly 1,000 kilograms. One international pound equals exactly 0.45359237 kilograms, while a kilogram contains 1,000 grams.
- 1000 kg to metric tonnes: 1000 / 1000 = 1 t
- 1 kg to pounds: 1 / 0.45359237 = ≈ 2.20462 lb
- 2500 g to kilograms: 2500 / 1000 = 2.5 kg
Important note
Metric tonnes, US short tons and UK long tons are different units. Confirm the requested definition.
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Frequently asked questions
How many grams are in a kilogram?
1 kilogram = exactly 1,000 grams, so divide grams by 1,000 to convert them to kilograms.
How many pounds are in a kilogram?
1 kg ≈ 2.20462262185 lb.
How many pounds are 70 metric tonnes?
70 metric tonnes = 70,000 kg ≈ 154,323.5835 lb.
How many grams are in an ounce?
One avoirdupois ounce is exactly 28.349523125 grams.
Is a metric tonne the same as a US ton?
No. A metric tonne is 1,000 kg, while a US short ton is 907.18474 kg.
Is the kilogram a unit of weight or mass?
Scientifically, the kilogram measures mass, while weight is a force measured in newtons and equals mass times gravitational acceleration. This tool uses “weight” in the everyday unit-conversion sense.