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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.
Weight Converter: step-by-step worked example
What is a body weight of 12 stone in kilograms?
- Value
- 12
- From
- Stone (st)
- To
- Kilograms (kg)
- 1
Source unit in the base unit
k₁ = one source unit expressed in grams
1 st = 6,350.29318 g = 6,350.29 g
- 2
Target unit in the base unit
k₂ = one target unit expressed in grams
1 kg = 1,000 g = 1,000 g
- 3
Convert to the base unit
g = Value × k₁
12 × 6,350.29318 = 76,203.52 g
- 4
Convert to the target unit
Result = g ÷ k₂
76,203.51816 ÷ 1,000 = 76.203518 kg
- 5
Direct conversion factor
Factor = k₁ ÷ k₂
6,350.29318 ÷ 1,000 = 6.3503
- kg76.2035
- t0.0762
- oz2,688
- lb168
- st12
Good to know: The definitions are exact: 1 lb = 453.59237 g, 1 oz = 1/16 lb, 1 st = 14 lb. A metric tonne (1,000 kg) is not a US short ton (907 kg).
Weight Converter — how it works
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.
Kilograms to pounds and ounces table
| Kilograms | Pounds (lb) | Ounces (oz) |
|---|---|---|
| 1 | 2.2 | 35.27 |
| 2 | 4.41 | 70.55 |
| 5 | 11.02 | 176.37 |
| 10 | 22.05 | 352.74 |
| 20 | 44.09 | 705.48 |
| 50 | 110.23 | 1,763.7 |
| 70 | 154.32 | 2,469.18 |
| 100 | 220.46 | 3,527.4 |
Grams to ounces and pounds table
| Grams | Ounces (oz) | Pounds (lb) |
|---|---|---|
| 10 | 0.353 | 0.022 |
| 50 | 1.764 | 0.11 |
| 100 | 3.527 | 0.22 |
| 250 | 8.818 | 0.551 |
| 500 | 17.637 | 1.102 |
| 1,000 | 35.274 | 2.205 |
Frequently asked questions
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.
About this page
- Publisher:
- Kalkoro — Teknolojig Bilişim Teknolojileri A.Ş., İstanbul
- Written by:
- Ahmet Tur — Editor (Math, date & time, unit conversion, physics & chemistry, everyday tools)
- Reviewed by:
- Kübra Yıldız — Editor
Parameters come from official sources; the last update date is shown at the bottom of the page.
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