Convert LBS to KG

This page opens the weight converter preset to pounds → kilograms. Since the 1959 international agreement, one avoirdupois pound is exactly 0.45359237 kg, so kilograms = pounds × 0.45359237 — a halving-minus-10% mental shortcut, made exact.

Reference points: 10 lbs is 4.54 kg, a 150 lb person weighs 68 kg, 200 lbs is 90.7 kg, and a 45 lb gym plate is 20.4 kg. The classic US birth-weight announcement of 7 lbs 8 oz works out to about 3.4 kg.

Reach for this conversion when reading US recipes and product weights, translating body weight from American sites, checking dumbbell markings or filling in metric customs forms. Both fields stay in sync, so you can start from either side.