How to Measure Your Horse Without a Scale 
Body Weight (in kilograms) = girth circumference squared (in centimeters) times body length (in centimeters) divided by 11,877 To square is to multiply by the same number. Here's how it works: Measure the horse's girth circumference just behind the elbows and withers at the narrowest part of the trunk. Measure body length from the center of the front of the chest, straight back along the horses side to the centerofthe tailbone. To convert inches into centimeters, multiply by 2.54; to convert kilograms to pounds multiply by 2.2. An example: For a horse with a gith of 75 inches (190.5 centimeters) and a body length of 80 inches (203.2 centimeters), the calulations would be 190.5 squared, multiplied by 203.2, and then divided by 11,877. The calculated body weight of 621 kilograms converts to 1,366 pounds. | 
