How to convert pounds to kilograms
Every pound is 0.4536 kilograms, so the conversion is a single multiplication:
Worked example: 25 lb → 25 × 0.453592 = 11.3398 kg.
Quick mental estimate: Divide by 2.2: 25 ÷ 2.2 ≈ 11.3636 kg (exact: 11.3398).
Pounds to kilograms conversion table
| Pounds (lb) | Kilograms (kg) |
|---|---|
| 1 lb | 0.4536 kg |
| 2 lb | 0.9072 kg |
| 3 lb | 1.3608 kg |
| 5 lb | 2.268 kg |
| 10 lb | 4.5359 kg |
| 15 lb | 6.8039 kg |
| 20 lb | 9.0718 kg |
| 25 lb | 11.3398 kg |
| 50 lb | 22.6796 kg |
| 75 lb | 34.0194 kg |
| 100 lb | 45.3592 kg |
| 200 lb | 90.7184 kg |
| 250 lb | 113.4 kg |
| 500 lb | 226.8 kg |
| 1,000 lb | 453.59 kg |
Values rounded to four decimals. For a value that is not in the table, use the converter above — it accepts decimals and negative numbers.
When you need this conversion
- Cooking from a foreign recipe, where ingredient weights are given in the author’s local unit.
- Shipping and luggage: carriers publish limits in kilograms in most of the world and in pounds in the United States, and going over costs money.
- Health and fitness tracking, where body weight and equipment loads are quoted in whichever unit the app or gym was set up with.
Getting it right
The arithmetic is a single multiplication, so mistakes almost never come from the calculation itself — they come from the value that goes into it. Check that the figure you are converting really is in pounds and not in a neighbouring unit, and that you have not already converted it once.
Sanity-check the direction of the result before you use it. One pound is 0.4536 kilograms, so converting pounds to kilograms should make the number smaller. If it moved the other way, the conversion was applied backwards — the reverse converter is one click away.
About the units
Pound (lb)
The pound is the everyday weight unit of the United States, fixed at exactly 0.45359237 kilograms in 1959. Body weight, groceries and shipping are quoted in pounds.
Kilogram (kg)
The kilogram is the SI base unit of mass, defined since 2019 through the Planck constant. A liter of water weighs almost exactly one kilogram.
Frequently asked questions
How many kilograms are in 1 pound?
1 pound equals 0.4536 kilograms. To convert any value, multiply the number of pounds by 0.453592.
How do I convert pounds to kilograms in my head?
Divide by 2.2: 25 ÷ 2.2 ≈ 11.3636 kg (exact: 11.3398).
Is the lb to kg conversion exact?
1 pound is exactly 0.45359237 kg; 0.453592 is that value rounded to 6 decimals.
How do I convert pounds to kilograms in Excel or Google Sheets?
Put the value in A1 and use =A1*0.453592. Both Excel and Google Sheets also have a built-in function, =CONVERT(A1,"lbm","kg"), which avoids typing the factor by hand.
How many decimal places should I keep?
For everyday use two decimals are plenty. Keep four if the result feeds another calculation, and round only at the very end — rounding intermediate steps is the most common reason a result comes out slightly wrong.