Horse Weight Calculator
Estimate weight with a measuring tape.
Instant results✓ Source-backed
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How this is calculated
Carroll & Huntington (1988) formula: heart girth² × body length ÷ 330 (inches → lb), equal to cm² × cm ÷ 11,880 → kg. Accurate to within about ±3–5% for adult light horses; less accurate for foals, ponies, drafts and pregnant mares.
Source-based educational tool; not independently reviewed by a veterinarian. Cited guidance does not imply endorsement by its authors.
Formula
Weight (kg) = girth² (cm) × length (cm) ÷ 11,880
Assumptions
- •Adult light-breed horse
- •Girth measured after exhaling
- •±3–5% typical error