Weighing a pig with no scale

krisandlarry.com
Our BIG Mama, HAMMY and the 3 little meat pigs

We have been using the following technique to  weigh our meat pigs. 

krisandlarry.com
Griffen Measuring Pig Heart Girth

Measure around their heart girth… Easiest way to measure pig is during feeding time. 

Remember that number. For our smaller 4-1/2 month old pigs they measured about 39 inches around the heart girth (They are all about the same size.)

Next, measure from ears to tail along their spine. 

For our 4-1/2 month old meat pigs, the was 44 inches length.

Next multiply girth x girth x length.

That number came out to 39 x 39 x 44 = 66,924

Pig Length - krisandlarry.com
Griffen Measuring Pig Length

(Shelby says) DON’T PANIC! This is not what your pig weighs!

Now, take that answer and divide by 400. 

66,924 / 400 = 167.31

So this is the approximate current weigh of our meat pigs 167 pounds – We are right on track to them being of a good weigh for the end of March.

Our big Mama, HAMMY measured 58 heart girth by 58-1/2 length (We told you she is a big mama!!!) That comes out to 58 x 58 x 58.5 = 196,794 /400 = 491.99 pounds!!! She is due for babies in March!

This is the best info that we have found online about weighing pigs: 

http://www.thepigsite.com/articles/541/weighing-a-pig-without-a-scale/ 

The most accurate way to measure the weight of a pig is to use a specialist pig weigh. However, these can be expensive and if you only have a few pigs to weigh and a high degree of accuracy is not necessarily needed, we explain how to obtain a good estimate of a pigs weight using only a measuring tape and a calculator.

IMPERIAL – Weight of your pig in POUNDS

  1. Obtain a fabric measuring tape or a piece of string to use as a measure. If using string mark the dimensions on the string and then measure the dimensions using a steel tape measure.
  2. Place the tape/string under the pig just behind the front legs and measure the circumference of the pigs girth in inches. This measurement is known as theHeart Girth (see graphic)
  3. Then measure the Length of the pig along its back from the base of its ears to the base of its tail, again in inches. (see graphic)
  4. To calculate the pigs weight, first square the Heart Girth to get the Girth Result.
  5. Now Multiply the Girth Result by the Length and DIVIDE by 400.
  6. You now have the weight of your pig in Pounds.
Girth Measurement Length Measurement

Example:

  • Porky Pig has a Heart Girth of 50 inches and a Length of 40 inches.

  • Squaring the Heart Girth (50 x 50) = 2500 = Girth Result

  • Multiply the Girth Result (2500) by the Length (40) and divide by 400 = 250 Pounds.