Online Pig Weight Calculator

Pig Weight Calculator

How To Measure A Pig

Ex-straw-dinaryAs the day of reckoning approaches for the two pigs, it’s time to see how well they’ve been growing. My usual aim is to produce pigs that weigh roughly 60kg at six months old. And while it’s still just about possible to hefting a creature of this size, I’d be doing little more than tormenting the poor piggies.

This is where, in the absence of an actual pig weighing machine, a tape measure and a calculator come in handy. All you have to do is measure the length of the pig’s body (from between the ears to the point where the tail starts) and its girth (around the body, just behind the front legs). With these measurements, you can get an estimate of the pig’s weight.

Handily, I’ve had a calculator made so you (and I) can just shove in those numbers, either in inches or centimetres, and get an estimated live weight AND carcass weight (i.e. after it’s been… emptied at the abattoir).

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18 comments on “Online Pig Weight Calculator
  1. Helen says:

    Interesting – this seems much more accurate than pig tape I bought recently – would have saved some mistakes. Are you killing out at 60kilo so 40ish carcass? I aim for 50 – 55 carcass weight at 7/8months old breeds.

  2. Phin Hall says:

    Hi Helen
    Yes, I aim for a live weight of 60kg, which works out at just a little over 40kg once the abattoir have done their deadly work. My experience with old breeds (Berkshire and British Saddleback) has been that they reach 60kg in around 6 months, so your aim for 50-55 carcass wight at 7-8 months sounds good.
    All the best

  3. Paul says:

    Hi – my SB/large white cross boars are just shy of 22 weeks and according to the ‘tale of the tape’ are coming in at 72kg and 80kg. I can only measure them when they are feeding (and therefore standing still for long enough) however their heads are bent right down as they feed and I suspect significantly exaggerating the length – any tips?

    • Phin Hall says:

      I have to admit, this was something I worried about too, Paul. Like you I measured my pigs when they were feeding (pretty much the only time it was possible!) and I was concerned that the extra stretch in the neck would throw the weighing out. However, despite this, I found the results to still be accurate within about 5%. And your weight sounds about right for 22 weeks – I took my SBxBerkshire boars to 18 weeks and they weighed 60kg give or take. I hope that helps.

  4. Malcolm Fishlock says:

    Hello, when you are talking carcass weight, does this include the head and offal?

    • Phin Hall says:

      Hi Malcolm. There are a several terms used for the weights as follows:

        Finished or live weight: the weight of the animal when it’s alive and ready for slaughter (and therefore whole and intact).
        Dead or carcass weight: refer to the weight of the animal post-slaughter.

      The only difference between the two weights is that the second doesn’t include the innards – everything from the neck through to… the other end. Both include the head.

  5. Help, I have and old– Gloucester old spot pig which we keep as a pet, ( We get/buy Weaners in to sell ) but My problem is WE CANT BELEIVE HER size !! measurements are 72″girth and 78″ back that makes Her 72 STONE !!! what are we doing wrong !! Please !! (Obviously feeding Her too much but people make joke of our home as “Welcome to PIG HEAVEN!!” )

  6. Ram Liquigan says:

    Thank you for this. It helped me to confirm my estimation is correct. I am from Philippines and first time to raise pigs. We have 6 pigs,I am not sure of the breed. The biggest weighs 80kgs for 19 weeks while two of them have the 54 kgs while others weigh 60-65 kgs.

  7. Maureen Barnard says:

    Thank you for your calculator! I am a little taken aback to discover the weight of two of my sows. One 3 year old GOS/ Tamworth cross sow weighs 790#!!! Using a length of baking twine, I measured from just behind her ear to the top of her tail, and then around her girth. I knotted the twine to mark the length, then laid it out on the barn floor and measured this against a tape measure. Big girl!

  8. butihinganakph says:

    Good day guys, how accurate the formula? My pig heart Girth: 35 and length: 42 and the weight is 128 lbs.? I worried about it because my pig is 140 days and the size is like my 85 kgs. before. Hope you can help me guys..

    • Phin Hall says:

      Hi there
      While not all pigs are equal (though some are apparently more equal than others!), in my experience the formula is accurate to within around 5%. That said, I’ve not used it for any pigs above 80kg as I take mine to the abattoir at around 6 months. Let me know how it goes!

  9. Carriagedale says:

    Thank you so much for this nifty calculator, it is very helpful and easier than doing the written calculations. I have your site bookmarked and go to the calculator often!

  10. Pigfarmer says:

    I’ve four Duroc pigs over here in the US (Nevada) and this online calculator is really helpful! Of course, my measurements are in inches…and I’ll be heading to the butcher in about three weeks with one. The weight I’m shooting for is 250 pounds.

    • Phin Hall says:

      250lbs is a great weight! I measured mine up yesterday (in cms) and they’re 61kg & 66kg, so I’ll be taking them to the great abattoir in the sky (or rather the real abattoir up the road) in a couple of weeks. Hope yours go well.

  11. Carriagedale says:

    Wondering if someone can help me please solve a puzzle? If a dressed out pig, including the head and feet and tail, less all the organs, offal and tongue, weighed 302 lbs hanging, how much do you think it weighed live? I taped him live and calculated him to be 344lbs, but I’m not sure I got an accurate measurement. I’m trying to figure out what all the insides weighed? We know the 302 lbs. is correct. Thank you!

    • Carriagedale says:

      P.S. I forgot to mention that this pig was scaled so skin was left on.

      • Phin Hall says:

        Without an accurate scale weight taken of the whole and dressed pig, it’s almost impossible to be certain of the weight of the innards as they can be anything from 10% to 30% of the total weight. If your pig was 344lbs, the innards would be somewhere between 34 and 103lbs, so your calculation of 42lb difference from taped live weight to measured hanging weight could well be right.

        That’s a good-sized pig, by the way. What will you be doing with the meat?

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