Pounds to Kilograms Converter
Convert pounds to kilograms instantly with this free pounds to kilograms converter. Enter any value to get an accurate weight & mass conversion, plus the formula, the conversion factor and a full reference table.
What is 1 pound in kilograms?
1 pound is equal to exactly 0.45359237 kilograms.
1 ÷ 2.20462262 = 0.45359237 kilograms
1 pound = 0.45359237 kilograms
Pounds to Kilograms formula
kg = lb ÷ 2.20462262
The pounds to kilograms conversion factor is 0.45359237, which is exact by definition. 1 pound = 0.45359237 kilograms, and 1 kilogram = 2.20462262185 pounds.
Worked examples
- 2 pounds = 0.90718474 kilograms — 2 ÷ 2.20462262 = 0.90718474 kilograms
- 6 pounds = 2.72155422 kilograms — 6 ÷ 2.20462262 = 2.72155422 kilograms
- 10 pounds = 4.5359237 kilograms — 10 ÷ 2.20462262 = 4.5359237 kilograms
Pounds to Kilograms conversion table
Every value below is calculated with the exact conversion factor and rounded for display.
| Pounds (lb) | Kilograms (kg) |
|---|---|
| 1 lb | 0.45359237 kg |
| 2 lb | 0.90718474 kg |
| 3 lb | 1.3607771 kg |
| 4 lb | 1.8143695 kg |
| 5 lb | 2.2679619 kg |
| 6 lb | 2.7215542 kg |
| 7 lb | 3.1751466 kg |
| 8 lb | 3.628739 kg |
| 9 lb | 4.0823313 kg |
| 10 lb | 4.5359237 kg |
| 12 lb | 5.4431084 kg |
| 15 lb | 6.8038856 kg |
| 20 lb | 9.0718474 kg |
| 25 lb | 11.339809 kg |
| 30 lb | 13.607771 kg |
| 50 lb | 22.679619 kg |
| 75 lb | 34.019428 kg |
| 100 lb | 45.359237 kg |
| 500 lb | 226.79619 kg |
| 1,000 lb | 453.59237 kg |
When you need to convert pounds to kilograms
- Cooking from recipes that give ingredients by weight in a different system.
- Checking airline baggage allowances, which are quoted in kilograms almost everywhere except the US.
- Recording body weight, gym plate loads or shipping weights across regions.
Getting a feel for the scale
A converted number is easier to trust when you can picture it. These reference points let you sanity-check the result at a glance.
Pound (lb)
- A loaf of bread is about 1 lb
- A US gallon of water weighs 8.34 lb
Kilogram (kg)
- A litre of water weighs 1 kg
- A bag of flour is usually 1 or 1.5 kg
Mental shortcut
Halve it and take off 10%. 150 lb → 68 kg (exact 68.04).
Common mistakes to avoid
- Dividing when you should multiply. Because 1 pound = 0.453592 kilograms, the answer should be smaller than the number you started with.
- Rounding too early. Convert first at full precision, then round the final answer to the precision the task actually needs.
How precise does the answer need to be?
Kitchen scales resolve to about 1 g or 0.1 oz, so two significant figures beyond the decimal point is wasted precision. Postage and freight are normally rounded up to the next billing increment.
How these units are defined
- Pound (lb): Exactly 0.45359237 kilograms; the primary US weight unit. This unit's relationship to the SI base unit is exact by definition, so no rounding enters the conversion factor.
- Kilogram (kg): The SI base unit of mass, defined via the Planck constant. This unit's relationship to the SI base unit is exact by definition, so no rounding enters the conversion factor.
Related conversions
Frequently asked questions
- What is 1 pound in kilograms?
- 1 pound is equal to 0.45359237 kilograms.
- How many pounds are in one kilogram?
- There are 2.20462262 pounds in 1 kilogram.
- How do you convert pounds to kilograms?
- Multiply the number of pounds by 0.45359237 — or use the formula kg = lb ÷ 2.20462262.
- What is 6 pounds in kilograms?
- 6 pounds is 2.72155422 kilograms. 6 ÷ 2.20462262 = 2.72155422 kilograms.
- Is the pounds to kilograms conversion exact?
- Yes. The relationship is fixed by definition, so 0.45359237 is an exact conversion factor — only the displayed result is rounded.