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Weight is measured in two systems — metric (grams, kilograms, tonnes) and imperial (ounces, pounds, stone) — and moving between them is a constant need: a recipe in ounces, a body weight in stone, a shipping limit in kilograms. The conversion factors are fixed and exact, so a converter gives precise answers instantly.
Enter a value, pick the units, and the converted weight appears at once.
How is it calculated?
Key conversion factors
| Conversion | Factor |
|---|---|
| 1 kg | 2.204623 lb |
| 1 lb | 16 oz = 453.592 g |
| 1 stone | 14 lb = 6.35029 kg |
| 1 oz | 28.3495 g |
| 1 metric ton | 1,000 kg |
Metric units scale in powers of ten (1 kg = 1,000 g), which makes them easy; imperial units use fixed but irregular steps (16 oz to a pound, 14 lb to a stone).
Metric vs imperial, at a glance
- Metric (most of the world): milligram, gram, kilogram, tonne.
- Imperial/US (US, and UK for body weight): ounce, pound, stone.
- Body weight is often quoted in kilograms, pounds, or (in the UK) stones and pounds.
Common conversions
- A 70 kg person weighs about 154 lb, or 11 stone.
- A pound of butter is 453.6 g; a 12 oz can is 340 g.
- A quick mental estimate: kilograms × 2.2 ≈ pounds.
Where it helps
- Converting a body weight between kg, lb and stone
- Following a recipe that uses ounces or grams
- Checking a luggage or shipping weight limit across systems
For distance and height, a length converter handles metres, feet and inches.
Worked example
Convert 70 kg to pounds: 70 × 2.204623 = 154.32 lb. In stone, that's 154.32 ÷ 14 = 11.02 stone — so a 70 kg person is about 11 stone. Going the other way, a recipe calling for 8 oz of flour is 8 × 28.3495 = 226.8 g. The exact factors matter for precision, but the rough shortcut "kg × 2.2" gets you close (70 × 2.2 = 154) — fine for a quick estimate, though the converter gives the precise 154.32 when it counts.
FAQ
How many pounds is a kilogram?+
1 kg = 2.204623 lb. To convert kilograms to pounds multiply by 2.2046; for a quick estimate, multiply by 2.2. A 70 kg person is about 154 lb.
How do I convert pounds to kilograms?+
Divide by 2.204623 (or multiply by 0.4536). So 154 lb ÷ 2.2046 ≈ 70 kg. Just pick the units in the converter and enter the value.
How many pounds are in a stone?+
1 stone = 14 pounds = 6.35029 kg. Stone is used mainly in the UK for body weight; 11 stone is about 70 kg or 154 lb.
How many grams in an ounce?+
1 ounce = 28.3495 grams, and 16 ounces make a pound (453.592 g). Handy for converting recipe quantities between imperial and metric.
What is my weight in stone?+
Divide your weight in pounds by 14, or your kilograms by 6.35. A 70 kg (154 lb) person is 11 stone. The converter shows any unit combination.
Is a metric ton the same as a US ton?+
No — a metric ton (tonne) is 1,000 kg (2,204.6 lb), while a US short ton is 2,000 lb (907 kg). This converter uses the metric tonne.