Free tool from TrotleyHorse weight calculator
Measure the heart girth and the body length with a soft tape. You get the estimated weight in pounds and kilograms, using the formulas in the Merck Veterinary Manual.
Enter a girth between 51 and 279 cm and a length between 51 and 254 cm.
Enter a girth between 20 and 110 in and a length between 20 and 100 in.
girth² × length ÷ {divisor} (cm, kg)
girth² × length ÷ {divisor} (in, lb)
- Heart girth. All the way round the body, just behind the shoulder and over the base of the withers, tape snug and level.
- Body length. From the point of the shoulder to the point of the rump, with the horse standing square.
Estimated weight
1,108 lb
503 kg
- Formula used
- girth² × length ÷ 330
- Maximum daily dry matter (2.5–3%)
- 28–33 lb
This formula reads slightly low, and tapes read lower still. Measure the same way each time and follow the trend.
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Horse breeds
- Akhal-TekeAkhal-Tekes average 15.2 hands and weigh 900 to 1,000 pounds, about 408 to 454 kg.
- American Miniature HorseMiniature Horses stand no more than 34 inches, and adults average about 257 pounds.
- American Paint HorseA Paint Horse stands 14.2 to 15.2 hands and weighs about what a Quarter Horse does, 1,000 to 1,300 pounds.
- American Quarter HorseMost Quarter Horses weigh 1,000 to 1,300 pounds and stand 14.2 to 15.2 hands.
- American SaddlebredAn American Saddlebred weighs 1,000 to 1,200 pounds and stands about 15 to 16.3 hands.
- AndalusianAndalusians usually stand about 15.2 hands, and a fair weight estimate is 1,000 to 1,300 pounds.
- AppaloosaMost Appaloosas weigh 950 to 1,250 pounds and stand 14 to 16 hands.
- ArabianAn Arabian usually weighs 800 to 1,000 pounds and stands 14.2 to 15.2 hands.
- Belgian DraftA Belgian Draft weighs 1,800 to 2,400 pounds and stands 16 to 18 hands.
- Chincoteague PonyChincoteague ponies average 12 to 13 hands, and our estimate of weight is about 720 pounds.
- ClydesdaleA Clydesdale weighs 1,600 to 1,800 pounds and stands 16.2 to 18 hands, and some stallions and geldings reach 2,200 pounds.
- Connemara PonyConnemaras average 14 to 14.2 hands, and our estimate of weight is about 1,000 pounds.
- CriolloCriollos in the Brazilian studbook weigh 400 to 450 kg, about 880 to 990 pounds, and stand 1.38 to 1.50 m at the withers across the sex classes.
- Dutch WarmbloodDutch Warmbloods average about 16.2 hands, and warmbloods as a group average 1,300 pounds.
- Fjord HorseMost Fjord Horses stand 14 to 14.2 hands and weigh 900 to 1,200 pounds.
- FriesianA Friesian averages 15.2 to 16 hands and weighs 1,300 pounds or more.
- Gypsy VannerGypsy Vanners stand 13.2 to 15.2 hands, and our estimate of weight is about 1,040 pounds.
- HaflingerHaflingers stand 13.2 to 14.3 hands, and our estimate of weight is about 950 pounds.
- HanoverianHanoverians stand 16 to 17.2 hands, and warmbloods as a group average 1,300 pounds.
- HolsteinerHolsteiners stand 16 to 17 hands, and warmbloods as a group average 1,300 pounds.
- Icelandic HorseIcelandic horses average 13 to 14 hands and 330 to 380 kg, about 730 to 840 pounds.
- LipizzanA Lipizzan stands 14.3 to 15.3 hands and weighs 1,000 to 1,300 pounds.
- LusitanoLusitanos are generally 15.1 to 15.3 hands, and a fair weight estimate is 1,000 to 1,300 pounds.
- Missouri Fox TrotterA Missouri Fox Trotter weighs 900 to 1,200 pounds and stands 14 to 16 hands.
- MorganA Morgan weighs 900 to 1,100 pounds and stands 14.2 to 15.2 hands.
- MustangNo source gives a Mustang weight or height, so weigh the horse in front of you.
- OldenburgOldenburgs stand 16.0 to 16.3 hands, and warmbloods as a group average 1,300 pounds.
- Paso FinoMost Paso Finos stand 13.3 to 14.2 hands and weigh 700 to 1,000 pounds.
- PercheronA Percheron averages about 1,900 pounds and stands 16.2 to 17.3 hands, with some up to 2,600 pounds.
- Peruvian PasoPeruvian Pasos average 14 to 15 hands and 900 to 1,100 pounds.
- Pony of the AmericasPOAs stand 46 to 56 inches, and our estimate of weight is about 720 pounds.
- Rocky Mountain HorseRocky Mountain Horses stand 14.2 to 15.2 hands and weigh 850 to 1,000 pounds, about 386 to 454 kg.
- Shetland PonyShetland ponies stand 10.2 hands or less and weigh no more than 300 to 400 pounds.
- ShireA Shire averages 17.1 to 17.2 hands and weighs up to 2,200 pounds.
- StandardbredMost Standardbreds stand about 15.2 hands and weigh 800 to 1,000 pounds, though one extension source runs to 1,300.
- Suffolk PunchA Suffolk Punch averages about 1,800 pounds and stands 16 to 17 hands.
- Tennessee Walking HorseA Tennessee Walking Horse weighs 900 to 1,200 pounds and stands 14.3 to 17 hands.
- ThoroughbredA typical Thoroughbred weighs about 1,000 pounds and stands about 16 hands.
- TrakehnerTrakehners stand 15.3 to 17 hands, and a fair weight estimate is about 1,250 pounds.
- Welsh PonyWelsh ponies run from under 12.2 hands to cob size, and the weight sources cover only the smallest.
How it works
Heart girth is measured around the body just behind the shoulder, at the base of the withers. Body length is measured from the point of the shoulder to the point of the rump, with the horse standing square.
For an adult horse (over 2 years), weight in pounds = heart girth × heart girth × body length ÷ 330, in inches. For a yearling the divisor is 301 and for a weanling 280. In centimetres, the adult formula is girth² × length ÷ 11,880 for kilograms.
The Merck Veterinary Manual notes that the formula is closer to real weight than a weight tape but tends to slightly underestimate. Measure the same way each time and the trend is reliable even when the number is a little off.
Adult: lb = girth² × length ÷ 330 (inches). Yearling: ÷ 301. Weanling: ÷ 280.
Good to know
- A scale is the only exact method. Use the estimate to follow changes and as a starting point.
- Weight tapes do not suit miniature horses, donkeys or draft horses; treat any girth-based estimate for them with caution.
- Ask your veterinarian before dosing a medicine from an estimated weight.
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<p style="margin:4px 0 0;font-size:14px"><a href="https://lucernel.com/tools/horse-weight-calculator">Horse weight calculator by Trotley</a></p>Frequently asked questions
How accurate is a horse weight tape?
Tapes are the least accurate tool and tend to underestimate. The girth-and-length formula is closer, but still slightly low; a scale is the only exact method.
Where do I measure heart girth?
All the way around the body just behind the shoulder, over the base of the withers, with the tape snug and level.
How much does a horse eat per day?
The Merck Veterinary Manual puts the maximum daily intake at about 2.5 to 3% of body weight in dry matter. Your veterinarian or nutritionist sets the actual ration.
Sources
Checked on September 26, 2026.
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