Do you know how much the head weighs alone? This is always around 10% of the animal's total mass, unless they have a really big noggin. A completely matured horse comes in anywhere between 900 and 2,200 pounds. Draft horses easily tip the scale over 2,000 pounds. It’s no joke, some literally weigh a ton! Light saddle horses are generally between 900 and 1,300 pounds. Big muscular stallions and many draft breeds can weigh over 1,300 pounds.