Biology

Horse Weight Calculator

Estimate a horse's weight from girth and body length.

Heart girth

Body length

Calculated Output

Estimated weight 1,036.8

Estimated weight 470.28

Formula: weight (lb) = girth² × length ÷ 330

Step-by-Step Breakdown

1. Values used:

2. Heart girth = 72

3. Body length = 66

5. Estimated weight = 1,036.8

6. Estimated weight = 470.28

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The math behind it

weight (lb) = heart girth² × body length ÷ 330 (girth around the barzel; length from point of shoulder to point of buttock).

72 in girth, 66 in length → ~1,037 lb.

Ponies/foals?

Use 299 instead of 330 for ponies; foals use different formulas.