How Much Does Your Horse Weigh?
DETERMINING BODY WEIGHT
The formula for determining a horse’s body weight is:
Heart girth measurement in inches, squared (the number multiplied by itself) times his length divided by 330.
(The heart girth measurement is taken just behind the elbow, around the barrel, and up over the withers. Keep the tape snug, but not tight. The length measurement is taken from the point of the shoulder blade to the point of the buttocks.)
Foals one to 6 weeks of age:
Heart girth measurement in inches subtract 25.1 divide by .07
Locations for using the formula
Weight tapes are not accurate and can be off by as much as 100 pounds. A scale designed for weighing horses is the most accurate method used to weigh a horse, but availability is limited.