Gym plates labeled 45lb or 25lb, or international shipping fees quoted per pound, leave a lot of people unsure what that actually is in kilograms.
The exact formula
One kilogram is exactly 2.20462 pounds. Multiply kg by 2.20462 to get lb.
A quick mental-math shortcut
"lb ≈ kg × 2.2" is close enough for most purposes. Going the other way, "lb ÷ 2.2" or "lb × 0.45" gets you kg.
Gym plate weights
US gyms typically use 45lb (about 20.4kg), 25lb (about 11.3kg), and 10lb (about 4.5kg) plates. Korean gyms standardize on kg plates (20kg, 15kg, 10kg), so following a US program (5x5, Starting Strength, etc.) means converting the numbers first.
International shipping weight limits
Many international couriers price by the pound. If you know an item's weight in kg, converting to lb ahead of time helps you estimate the shipping cost before you order.
Conversion table
| kg | lb |
|---|---|
| 1kg | 2.20lb |
| 5kg | 11.02lb |
| 10kg | 22.05lb |
| 20kg | 44.09lb |
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