lb to kg Converter - Pound to Kilogram
Pound (lb) to Kilogram (kg)
Direct answer
1 lb = 0.45359237 kg
kg = lb × 0.45359237
Converter
Conversion formula
kg = lb × 0.45359237
lb = kg × 2.20462262185
Example: 10 lb = 10 × 0.45359237 = 4.5359237 kg.
Common conversion table
| lb | kg |
|---|---|
| 1 lb | 0.45359237 kg |
| 2 lb | 0.90718474 kg |
| 5 lb | 2.26796185 kg |
| 10 lb | 4.5359237 kg |
| 20 lb | 9.0718474 kg |
| 50 lb | 22.6796185 kg |
| 100 lb | 45.359237 kg |
| 1,000 lb | 453.59237 kg |
Conversion derivation
Express both lb and kg in the same base unit kg (kilogram), then cancel the shared base unit.
- 1
Rewrite lb in the base unit
- 2
Rewrite kg in the base unit
- 3
Forward conversion
- 4
Reverse conversion
AI explanation for this conversion
This pre-generated explanation is schema-checked. Numeric results still come from the page formula and calculator.
Pound to Kilogram Conversion Factor
This conversion factor expresses the relationship between the pound and the kilogram. It defines that 1 pound equals 0.45359237 kilograms exactly.
Definition
The kilogram (kg) is the base unit of mass in the International System of Units. The pound (lb) is a unit of mass in the imperial system, where 1 lb is defined as 0.45359237 kg.
Principle
The conversion is based on the fixed definition of the pound in terms of the kilogram. To convert from lb to kg, multiply the mass in pounds by the factor 0.45359237. To convert from kg to lb, multiply by the inverse factor 2.2046226218487757.
Assumptions
- The conversion uses the exact defined relationship: 1 lb = 0.45359237 kg.
- The kilogram is the base unit for this conversion.
Cautions
- The conversion factor is exact, but results from calculations should be rounded to the precision required for the specific use case.
FAQ
How many kg are in 1 lb?
1 lb = 0.45359237 kg.
How many kg are in 10 lb?
10 lb = 4.5359237 kg.
How many kg are in 100 lb?
100 lb = 45.359237 kg.
What is the formula to convert lb to kg?
Use kg = lb × 0.45359237.
How many lb are in 1 kg?
1 kg = 2.20462262185 lb.
What should I check when converting lb to kg?
Use the conversion factor and round the result to the precision required by your calculation.