About this tool
This converter uses the exact international standard: 1 pound equals exactly 0.45359237 kilograms. Type a value into either field and the other updates instantly — nothing is sent to a server.
Quick reference table
| Kilograms | Pounds |
|---|---|
| 1 kg | 2.20 lb |
| 5 kg | 11.02 lb |
| 10 kg | 22.05 lb |
| 50 kg | 110.23 lb |
| 70 kg | 154.32 lb |
| 100 kg | 220.46 lb |
Common use cases
- Converting body weight between metric and imperial units
- Checking a package or luggage weight limit stated in the other unit
- Converting a product's listed weight for shipping or import purposes
- Converting a recipe's ingredient weight between kitchen scale units
Why pounds and kilograms aren't simply "close enough"
A kilogram is noticeably heavier than a pound — roughly 2.2 times as much — so rounding to "about double" only gets you an approximate answer, not an accurate one. For anything where the exact figure matters (a shipping weight limit, a medical dosage context, a recipe), use the precise conversion rather than a rough mental shortcut, since even a 10% error compounds quickly at higher weights.
Things to watch out for
The 0.45359237 kg-per-pound figure is an exact international definition, not a rounded approximation — small differences between calculators usually come from how many decimal places the result is rounded to, not the underlying conversion. For everyday use, 1-2 decimal places is generally precise enough.
Frequently asked questions
1 kilogram equals approximately 2.20462 pounds. The exact international definition is 1 pound = 0.45359237 kg, so 1 kg = 1 ÷ 0.45359237 pounds.
The pound used in the US, UK, and most conversion tools is the international avoirdupois pound, standardized in 1959 as exactly 0.45359237 kilograms — the same definition used worldwide for this conversion.
The conversion factor itself is exact and fixed, so any differences you see between two results usually come from how many decimal places each one rounds to, not a different underlying formula.