Horse breeds · from TrotleyStandardbred weight and height: harness racers, feeding for fitness and retirement
Standardbred weights run from 800 to 1,300 pounds depending on the source, and a horse in harness training and the same horse after retirement can need very different rations.
Short answer
Most Standardbreds stand about 15.2 hands and weigh 800 to 1,000 pounds, though one extension source runs to 1,300.
Oklahoma State University gives an average of 15.2 hands (62 inches) and 800 to 1,000 pounds (363 to 454 kg). Virginia Cooperative Extension lists 14.2 to 16.2 hands and 850 to 1,300 pounds (386 to 590 kg), and eXtension gives an average of 15.2 hands.
Oklahoma State University, Virginia Cooperative Extension and eXtension Horses
| Source | Height | Weight |
|---|---|---|
| Oklahoma State University | 15.2 hands average | 800 to 1,000 lb |
| Virginia Cooperative Extension | 14.2 to 16.2 hands | 850 to 1,300 lb |
| eXtension Horses | 15.2 hands on average | Not given |
The two weight ranges overlap between 850 and 1,000 pounds.
Why the sources differ
Oklahoma State describes the Standardbred as resembling the Thoroughbred but shorter and longer in the body, and says individuals tend to either trot or pace. A horse in hard training is lean and a retired one is not, which is one reason a single range struggles to cover the breed. Weigh the horse you have.
Daily hay for a 900 pound Standardbred
The arithmetic uses 900 pounds, the middle of Oklahoma State’s range. A larger frame near the top of Virginia’s range needs proportionally more: at 1,200 pounds, 2% is 24 pounds of dry matter.
Merck’s starting point for a healthy adult is 2 to 2.5% of body weight in feed dry matter a day, at least half of it forage, and 1.5% for an obese horse, with a warning that severe restriction can be harmful. These figures are our arithmetic from 900 lb, counting hay as 90% dry matter (Merck gives 88 to 90%).
- 1.5% of body weight: 14 lb (6 kg) of dry matter, about 15 lb (7 kg) of hay
- 2% of body weight: 18 lb (8 kg) of dry matter, about 20 lb (9 kg) of hay
- 2.5% of body weight: 23 lb (10 kg) of dry matter, about 25 lb (11 kg) of hay
A weight tape example for a Standardbred
The horse weight calculator uses the adult equation in the Merck Veterinary Manual: heart girth squared times body length, in inches, divided by 330, gives pounds. A heart girth of 68 inches and a body length of 65 inches gives 68 x 68 = 4,624, times 65 = 300,560, divided by 330 = about 911 lb (413 kg). Those measurements are our illustration of the formula, not a real horse.
Merck notes the equation slightly underestimates real weight and that a scale is the only exact method, so measure the same way each time to keep the trend reliable.
Feeding for work
The University of Georgia says most performance horses can meet their calories with hay and grain, but that the large grain amounts racehorses may need to hold condition can cause colic and ulcers. Fat can replace part of the grain, up to 10% of the diet, and it may raise muscle glycogen. A grain meal within two hours before hard exercise can lower the fuel available, and concentrates belong two hours after intense work. Merck advises no more than 0.5% of body weight in grain based concentrate at one feeding, which is 4.5 pounds for a 900 pound horse.
Ulcers
Merck puts the prevalence of gastric ulcers at 90% or more in racehorses in active training and racing, and lists high concentrate diets, long gaps between meals and travel among the risk factors. Your vet can confirm ulcers and advise on feeding if a horse is off its feed.
After the racing years
When work drops and the ration does not, weight climbs. Merck advises adjusting amounts to keep a score of 4 to 6 on the 9 point scale, and the University of Georgia suggests changing the concentrate by 20% for each point away from a target of 5. Merck says most horses on good forage need little or no concentrate, and lists hard exercise, pregnancy, lactation and trouble holding weight as the exceptions.
Body condition
The University of Georgia table describes a 5 as a horse whose ribs cannot be seen but are easily felt, and a 4 as a faint outline of ribs. Score the horse monthly through any change in training and record the tape estimate beside it.
Frequently asked questions
How much does a Standardbred weigh?
Oklahoma State gives 800 to 1,000 pounds (363 to 454 kg). Virginia Cooperative Extension lists a wider 850 to 1,300 pounds, so a scale or tape on the individual horse is the better guide.
How much does a Standardbred eat a day?
For a 900 pound horse, 2% of body weight is 18 pounds of dry matter, about 20 pounds of hay, and 2.5% is 23 pounds, about 25 pounds of hay. Merck gives 2 to 2.5% as the usual range. These figures are our arithmetic.
Can a Standardbred carry a 170 pound rider?
The University of Minnesota gives about 20% of ideal bodyweight, rider and tack included, as a comfortable load for an average adult light riding horse. For 900 pounds that is 180 pounds, so a 170 pound rider with 20 pounds of tack, 190 in all, is over it.
Does a Standardbred need grain?
Merck says most horses need little or no concentrate on good forage, and lists hard exercise, pregnancy, lactation and difficulty holding weight as exceptions. A horse in harness training is one such case. A retired horse often is not.
Sources
- Oklahoma State University, Breeds of Livestock: Standardbred Horses
- Virginia Cooperative Extension, Horseless Horse Project Unit 2 (4H-931)
- eXtension Horses, Light Horse Breed: Standardbred
- University of Georgia Extension, Feeding strategies for peak performance in horses (B 1365)
- Merck Veterinary Manual, Feeding Practices in Horses and Other Equids
- Merck Veterinary Manual, Nutritional Requirements of Horses and Other Equids
- Merck Veterinary Manual, Gastric Ulcers in Horses
- University of Minnesota Extension, Guidelines for weight-carrying capacity of horses
Checked on October 2, 2026.
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See TrotleyMore in Horse breeds
- ThoroughbredA typical Thoroughbred weighs about 1,000 pounds and stands about 16 hands.
- MorganA Morgan weighs 900 to 1,100 pounds and stands 14.2 to 15.2 hands.
- ArabianAn Arabian usually weighs 800 to 1,000 pounds and stands 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.
- 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.
- Horse weight calculatorFree tool: Estimate a horse’s weight from heart girth and body length with the formulas in the Merck Veterinary Manual, for adults, yearlings and weanlings.
