Horse Weight & BCS Estimator

All biology tools

Estimate your horse's weight and track their Body Condition Score for optimal health and dosage accuracy.

Measurements

Unit System

Maturity Level

Heart Girth

Body Length

Weight Comparison (lb)

Weight Estimate

436kg

Calculated Weight

Clinically validated formula (Heart Girth² × Length / Factor).

Henneke BCS Guide

Score 5 is ideal for most horses.

This estimate is accurate within 5-10%. Use for feeding and general care.

BCS Reference

Score 1: Poor

Emaciated, bones visible.

Score 5: Moderate

Ideal. Level back, ribs felt not seen.

Score 9: Obese

Bulging fat, crease down back.

About this calculator

Why Weight Matters

Knowing your horse's weight isn't just for curiosity. It is the foundation for accurate deworming, medication dosing, and calculating 1.5–2% of body weight for forage intake. Combine weight with the Henneke BCS system (1–9) to truly understand your horse's nutritional state.

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Pro Tips

Heart Girth: Wrap the tape just behind the front legs and over the highest point of the withers. Ensure the horse has exhaled.
Body Length: Measure from the point of the shoulder in a straight line to the point of the buttock (not around the curve).
BCS Check: 'The Eye lies, the Hand tells.' Always palpate (feel) for fat over ribs, neck, and tailhead.
Ideal Score: Most performance horses should be a 5, while breeding mares are often kept at a 6 or 7.

Fun Facts

"Sampson, a shire horse born in 1846, was the heaviest horse ever recorded at 3,359 lbs (1,524 kg)!"
"Horses can drink 5-10 gallons of water a day, adding significant weight fluctuation."
"Draft horses have a lower 'Factor' in formulas because they are denser and more muscular than light breeds."
"A horse's heart girth often increases or decreases by several inches based on their fitness level, even if their weight stays steady."