Formula and method
Worked example
1 kg × 2.204622622 = 2.2046 lb.
Assumptions and limits
- Pounds are avoirdupois pounds, not troy pounds; the US ton is 2,000 lb and the long ton (2,240 lb) is not listed.
- Results show up to 4 decimals; Copy and CSV keep more digits.
Frequently asked questions
How many lb are in 1 kg?
1 kg = 2.204622622 lb. The factor follows from the SI definitions: 1 lb = 0.45359237 kg exactly (1959 international agreement).
How do I convert lb back to kg?
Multiply by 0.45359237 (or divide by 2.204622622), or simply switch “From unit” to lb. For example 10 lb = 4.5359 kg.
Why do people say 1 kg is 2.2 lb?
1 kg = 2.20462262 lb, derived from the exact definition 1 lb = 0.45359237 kg. 2.2 is a handy approximation that is about 0.46 lb off at 100 kg; a 23 kg checked-bag limit is about 50.7 lb. Use the exact value for billing and customs.