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Cattle Weight From Measurement Calculator

Work out cattle weight from measurement instantly with clear inputs, formula shown and shareable results.

About Cattle Weight From Measurement Calculator

The Shaeffer formula estimates live weight from heart girth squared times body length divided by a breed constant, working in inches and pounds. The divisor is about 300 for cattle and lower for the heavier-bodied buffalo. Applying a dressing percentage gives an indicative carcass weight.

Formulas

Shaeffer weight formula

Weight (lb) = girth (in)^2 x length (in) / divisor (cattle 300, buffalo 280, calves 340)

Carcass

Carcass weight = live weight x dressing %

Worked example

With the default values below, Cattle Weight From Measurement Calculator returns Estimated Live Weight of 418.53. Change any input above and every figure here is recalculated in your browser.

Inputs used

Heart Girthminimum 10 cm
180 cm
Body Length (shoulder to pin bone)minimum 10 cm
140 cm
Animal Typeone of Cattle, Buffalo, Young stock / calf
Cattle
Dressing Percentageaccepts 20–80 %
52 %

Results

Estimated Live Weight
418.53
Live Weight In Pounds
922.7
Estimated Carcass Weight
217.63
Heart Girth In Metres
1.800

Step by step

  1. 1Values used
  2. 2Shaeffer weight formula
  3. 3Carcass
  4. 4Estimated Live Weight= 418.53
  5. 5Live Weight In Pounds= 922.7
  6. 6Estimated Carcass Weight= 217.63
  7. 7Heart Girth In Metres= 1.800

Assumptions and limits

  • The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to 3 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
  • Do not use a tape estimate to calculate drug doses where a narrow therapeutic index applies. Weigh the animal or consult a veterinarian.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Do not use a tape estimate to calculate drug doses where a narrow therapeutic index applies. Weigh the animal or consult a veterinarian.

Frequently Asked Questions

How accurate is a tape estimate?

Within about 5-8% of scale weight for animals of typical conformation. Very thin, very fat or heavily pregnant animals deviate more, so use scales where the weight drives a drug dose.

Where exactly is heart girth measured?

Around the chest immediately behind the front legs and over the withers, with the tape snug and the animal standing square with its head level.

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