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How to Calculate Pig Weight

Pig Weight Calculator

pig weight calculator

Unless you are a commercial hog farmer, you probably do not own a livestock scale to weigh your hogs or sows. Figuring out how to weigh a pig is easy if you know how to handle the pig and you can measure the pig's body length and girth. Use this guide to determine the weight of your livestock swine:

  • Measure the circumference of the animal, as shown in "distance C" in the illustration. Make sure to measure girth in relation to the location of the pig's heart.
  • Measure the length of the animal's body, as shown in distance A-B in the illustration. The pig must be standing or restrained in the position shown in the illustration for the calculation to be nearly accurate.
  • Using the measurements from steps 1 and 2, calculate body weight using the formula HEART GIRTH x HEART GIRTH x BODY LENGTH / 400 = ANIMAL WEIGHT IN POUNDS. For example, if an adult pig has a heart girth equal to 45 inches and a body length equal to 54 inches, the calculation would be (45 x 45 x 54) / 400 = 273 lbs.
  • If the hog or sow weighs less than 150 lbs., add 7 lbs. to the final answer. For example, if you have a young hog whose total body weight you have calculated to be 125 using the formula above, use the formula 125 + 7 = 132 lbs.