How to Weigh a Goat Without a Scale (Tape Method & Chart)

Written by Jawad · Sources and method

Measure the goat's heart girth (around the chest just behind the front legs) and its body length (point of the shoulder to the pin bone) in inches. Then weight in pounds = girth × girth × length ÷ 300. A goat with a 36 in girth and 31 in length weighs about 134 lb. The result is usually within 5–10% of scale weight.

What you need

A soft cloth or vinyl measuring tape (a sewing tape works), a helper or a milk stand to hold the goat still, and level ground. A piece of string and a carpenter's tape measure will do if that is all you have: wrap the string, mark it, then measure the string.

Step by step

1. Stand the goat square on level ground, with all four legs straight under it and its head up in a normal position. A goat with its head down or legs splayed will measure wrong.
2. Measure heart girth. Run the tape around the body just behind the front legs and elbows, up over the withers. Pull it snug enough to flatten the hair but not tight enough to press into the goat. Read it after the goat breathes out.
3. Measure body length. Measure in a straight line from the point of the shoulder (the bony bump at the front of the shoulder) to the pin bone (the bony point at the rear, beside the tail).
4. Do the math: girth × girth × length ÷ 300. Measure twice, use the average, and write the date and weight down so you can track gain.

Example: girth 32 in, length 28 in. 32 × 32 = 1,024. 1,024 × 28 = 28,672. 28,672 ÷ 300 = about 96 lb.

Goat weight chart (girth and length in inches)

Weight = girth² × length ÷ 300, the same formula the HerdMath livestock weight calculator uses for goats and sheep.

How accurate is it?

For an adult goat in normal condition, a careful tape measurement usually lands within 5–10% of scale weight. It is less reliable for:

• Very fat or very thin goats, because the formula assumes average body shape.
• Does in late pregnancy, whose belly adds weight the girth doesn't fully capture, and does that have just kidded.
• Young kids, which are built differently from adults. For kids, a hanging scale and a sling or a bathroom scale (weigh yourself holding the kid, then subtract your own weight) is easy and more accurate.
• A goat with a full rumen. Weigh at the same time of day each time, ideally before the morning feed, so the numbers compare.

What about goat weight tapes?

Feed stores sell goat weight tapes that read a weight straight from the heart girth. They are quick, but they skip body length, so long-bodied and short-bodied goats with the same girth read the same. The girth-and-length formula takes both into account. Whichever you use, use the same method every time so you can follow a goat's weight over months.

When you need a real scale

A tape estimate is fine for planning feed, tracking growth and judging condition. For anything where a few pounds matter, such as medication or a sale priced by weight, use a scale; many feed stores and sale barns will let you use theirs, and your vet can weigh a goat at a visit.

Common questions

Figures are typical values from university extension and breed-association guidance. Estimates only. Individual animals vary — confirm pregnancy and health questions with your veterinarian.