45 Pounds to KG
45 pounds is 20.41 kilograms. Multiply 45 by 0.453592 and you get 20.412 kg, rounded to 20.41 kg. In stone, 45 pounds is 3 stone 3 pounds. The 45 lb plate is the single most iconic piece of gym equipment in the world — it is the standard competition and training plate used in powerlifting, Olympic lifting, and recreational strength training in the US. UK lifters who train to American programming need to convert 45 lbs to kg constantly, making this one of the most practically used weight conversions in fitness.
For all pound-to-kilogram conversions, see our full kg to pounds & pounds to kg converter.
Also: 3 stone 3 pounds · 3.21 stone · Convert 45 lbs to stone →
Result
45 pounds is 20.41 kg and 3 stone 3 pounds. In gym use, the standard barbell plate in most American gyms is the 45 lb plate, weighing approximately 20.41 kg. This is the single most commonly loaded plate in powerlifting and strength training. In child development, 45 pounds is a weight most children reach around age 5 to 6. In weight loss tracking, losing 45 lbs represents a loss of 20.41 kg or 3 stone 3 pounds — a meaningful milestone. In luggage and freight, 45 lbs is approximately 20 kg.
A standard Olympic barbell weighs 20 kg (44 lbs). Add two 45 lb plates and the total is 20 + 20.41 + 20.41 = 60.82 kg, or approximately 134 lbs. Add four plates and the total is 20 + 81.64 = 101.64 kg, roughly 224 lbs. This is why UK lifters converting from American programming need the exact 45 lbs to kg figure — each plate adds 20.41 kg, not a round 20.
Weights Close to 45 Pounds
| Pounds (lbs) | Kilograms (kg) | Stone & Pounds | Decimal Stone |
|---|---|---|---|
| 39 | 17.69 kg | 2 st 11 lb | 2.79 st |
| 41 | 18.60 kg | 2 st 13 lb | 2.93 st |
| 43 | 19.50 kg | 3 st 1 lb | 3.07 st |
| 45 (this page) | 20.41 kg | 3 st 3 lb | 3.21 st |
| 47 | 21.32 kg | 3 st 5 lb | 3.36 st |
| 49 | 22.23 kg | 3 st 7 lb | 3.50 st |
| 51 | 23.13 kg | 3 st 9 lb | 3.64 st |
| 53 | 24.04 kg | 3 st 11 lb | 3.79 st |