1. How to convert lbs to kg
The conversion is a single multiplication: kg = lb × 0.45359237. Both units are defined
against the same base — the kilogram (kg) — so the factor is fixed and the result
is exact to the precision shown.
Worked at the two values people ask for most: 1 lb = 0.45359237 kg and
10 lb = 4.5359237 kg. Going the other way, lb = kg × 2.20462262185, so
1 kg = 2.2046226 lb — a direction with its own page, kg to lbs.
Results are given to eight significant figures. That is more precision than most jobs need — for a rough figure, treat 1 lb as about 0.45359237 kg and adjust — but rounding early and multiplying afterwards is how a small error becomes a visible one, so the full figure is what the converter carries.
2. Pounds to Kilograms conversion table
| Pounds (lb) | Kilograms (kg) |
|---|---|
| 1 lb | 0.45359237 kg |
| 2 lb | 0.90718474 kg |
| 5 lb | 2.2679619 kg |
| 10 lb | 4.5359237 kg |
| 20 lb | 9.0718474 kg |
| 25 lb | 11.339809 kg |
| 50 lb | 22.679619 kg |
| 70 lb | 31.751466 kg |
| 75 lb | 34.019428 kg |
| 100 lb | 45.359237 kg |
Every row is the same factor applied — nothing in the table is a special case, and any value in between behaves the same way. Type your own figure into the converter above and the Formula tile shows the arithmetic being used, so the result is checkable rather than taken on trust.
3. What the two units are
- Pounds (lb). One lb is 0.45359237 kg.
- Kilograms (kg). One kg is 1 kg.
Both are converted through the kilogram (kg): the value is multiplied by its own unit's factor to reach the base, then divided by the target unit's factor to leave it. No direct lbs to kg factor has to exist or be kept correct, which is also why the converter can show the same value in all 10 weight & mass units at once.
Weight and mass are treated as one quantity here, as everyday use does. The pound is exactly 0.45359237 kg by definition, so an ounce is exactly a sixteenth of that and a stone exactly fourteen pounds. Watch the tons: a US short ton is 2,000 lb, a UK long ton is 2,240 lb and a tonne is exactly 1,000 kg.
If the pair you actually want is not this one, the full unit converter runs every 10 weight & mass units off the same factor table, along with 11 other categories of measurement.
4. Pounds to Kilograms FAQs
How do I convert lbs to kg?
Multiply by 0.45359237. 1 lb = 0.45359237 kg, and 10 lb = 4.5359237 kg. The factor is exact to the precision shown, so the only rounding is the one you choose to do at the end.
How many kg is 1 lb?
1 lb = 0.45359237 kg. The full formula is kg = lb × 0.45359237, and 1 kg = 2.2046226 lb going the other way.
What is 10 lb in kg?
10 lb = 4.5359237 kg. The table above works the same factor through 10 values, and the converter takes any figure you type — including decimals.
How do I convert kg to lbs?
lb = kg × 2.20462262185, so 1 kg = 2.2046226 lb. Use the Swap button in the converter to reverse the direction without retyping the value, or open the dedicated kg to lbs page.
Is this weight or mass?
Both, treated as one quantity as everyday use does. The pound is defined as exactly 0.45359237 kg, so the conversion is exact. The kilogram is strictly a unit of mass and the pound-force a unit of weight, but the distinction only matters off this planet.
Is anything I type sent to a server?
No. The factor table ships with the page and every conversion runs in your browser. Nothing is uploaded, logged or written to storage, and the converter keeps working offline once the page has loaded.