How much does a horse weigh? Average weights by breed and type
An adult riding horse usually weighs about 900 to 1,300 pounds (400 to 600 kg), depending on breed, height and condition; a miniature horse weighs about 250 pounds, a pony about 700 and a draft horse close to 1,900, but only a scale tells you what your own horse weighs. Those are the averages the University of Minnesota Extension found when it weighed horses, mostly at shows, on a livestock scale. Without a scale, you can estimate your horse's weight from two tape measurements and a formula, and judge by eye and by hand whether that weight is right for it.
Picture the moment a dewormer syringe is in your hand and the dial asks for a weight. You guess about 1,100 pounds, what the horse weighed at the vet two summers ago, before a winter, a competition season and a move to another barn. The tape readings you did take are on an envelope, in a notes app and on the feed-room whiteboard, none of them dated, so nothing shows whether the horse is gaining or losing. Minnesota found that every owner in its studies guessed wrong, so the number on the dial deserves better than a memory.
The short version
| Question | Answer |
|---|---|
| Average riding horse | 937 to 1,300 lb (425 to 590 kg), depending on type (University of Minnesota) |
| Draft horse and Clydesdale | 1,877 lb (851 kg) on average; Clydesdales mostly 1,600 to 1,800 lb (Oklahoma State) |
| Pony and miniature horse | 722 lb (327 kg) and 257 lb (117 kg) |
| Without a scale | Heart girth × heart girth × body length ÷ 330, in inches, gives pounds |
| Dewormer dose | Set by weight on the label, for example 200 mcg/kg for ivermectin (Zimecterin) |
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Average horse weight chart by breed
In the University of Minnesota's study, light riding horses averaged 937 to 1,300 pounds, ponies 722 pounds, adult miniature horses 257 pounds and draft horses 1,877 pounds, while nutrition handbooks use 500 kg, about 1,100 pounds, as their standard adult horse. Minnesota weighed more than 1,400 adult horses, ponies and minis between 2011 and 2017, all at least three years old and not pregnant, and the Merck Veterinary Manual calculates rations from a baseline body weight of 500 kg (1,100 lb). In this horse weight chart, one hand is 4 inches and the kilos are our own conversion.
| Group | Type | Average height | Average weight |
|---|---|---|---|
| Light horses | Arabian | 14.2 hands | 937 lb (425 kg) |
| Light horses | Saddle-type, including gaited horses | 15 hands | 1,133 lb (514 kg) |
| Light horses | Stock-type, including Quarter Horses | 15 hands | 1,133 lb (514 kg) |
| Light horses | Thoroughbred | 16.1 hands | 1,184 lb (537 kg) |
| Light horses | Warmblood | 16.2 hands | 1,300 lb (590 kg) |
| Heavy horses | Draft | 17.2 hands | 1,877 lb (851 kg) |
| Heavy horses | Clydesdale (breed description) | Mostly 16.2 to 18 hands | 1,600 to 1,800 lb (726 to 816 kg), some up to 2,200 lb (998 kg) |
| Ponies and minis | Pony | 12.3 hands | 722 lb (327 kg) |
| Ponies and minis | Miniature, 3 years or older | 9 hands (36 in) | 257 lb (117 kg) |
These were mostly show horses, and the draft horses, ponies, saddle-type horses and adult minis averaged a body condition score of 6 or more on the 1 to 9 scale, so read the chart as what these horses weighed, not as what your horse should weigh. Most of the Thoroughbreds came from the New Vocations Charity Thoroughbred Show, and New Vocations is a racehorse adoption program; a 1988 study by Carroll and Huntington found that racing Thoroughbreds were significantly lighter than non-racing Thoroughbreds of the same height and condition score.
How much does a Quarter Horse weigh?
Stock-type horses, the group Quarter Horses usually fall into, averaged 1,133 pounds (514 kg) in Minnesota's study. That was the largest group, 493 horses at 15 hands. Stock-type is broader than one breed, so an individual Quarter Horse can weigh more or less.
How much does a draft horse weigh?
Draft horses in Minnesota's study averaged 1,877 pounds (851 kg), just under a US ton of 2,000 pounds, and 42 percent of them had a body condition score of 7 or higher. So a heavy draft horse can reach a ton, but the average one in the study didn't. Guinness World Records lists Sampson, a Shire foaled in 1846, who was later said to have weighed 1,524 kg (3,359 lb).
How much does a Clydesdale horse weigh?
Most Clydesdales stand 16.2 to 18 hands and weigh 1,600 to 1,800 pounds, according to Oklahoma State University's breed profile, and some mature stallions and geldings are taller and weigh up to 2,200 pounds. The Oklahoma State profile describes the breed rather than reporting a weighing, and Minnesota's draft group is not split by breed. For a Clydesdale, skip the weight tape: the Merck Veterinary Manual says tapes are not suitable for draft horses.
How much does a miniature horse weigh?
Adult miniature horses in Minnesota's study averaged 257 pounds (117 kg), and minis younger than three averaged 200 pounds. Minnesota's formulas for adult minis are meant for minis less than 34 inches at the withers, and Merck says weight tapes are not suitable for miniature horses either.
How much do foals weigh at birth?
In the University of Kentucky's example, a 1,100-pound mare produces a foal of about 110 pounds, roughly a tenth of her weight. That comes from Kentucky's 2009 article on gestational weight gain and is one worked example, not a rule for every mare. The National Research Council's growth table, as Merck reproduces it, puts a horse expected to reach 500 kg at about 168 kg at 4 months, 216 kg at 6 months and 321 kg at 12 months.
3 ways to estimate your horse's weight without a scale
A calibrated scale or weighbridge is the only truly accurate way to weigh a horse; without one, use the heart girth formula or a weight tape for the number, and a body condition score to judge whether that number is right. Merck writes that ideally a calibrated scale or weighbridge is used, and Ohio State University Extension suggests you drive a truck and trailer onto a vehicle scale with and without the horse and subtract the vehicle's weight. That spares you looking up how much does a horse trailer weigh, or how much does a 2 horse trailer weigh, because the scale weighs your own rig both times.
Guessing by eye is not one of the three ways. In a 1998 UK study of 600 horses on a weighbridge, estimates by eye came to 88.3% of the real weight on average, with the widest spread of any method, while the girth and length formula averaged 98.6%.
1. The heart girth formula
For an adult horse, multiply the heart girth by itself, multiply by the body length and divide by 330 to get the weight in pounds when you measure in inches; in centimeters, divide by 11,880 to get kilos. Merck gives both versions for horses older than two years, and other sources use 11,877, 11,900 or 12,000, a difference of about 1%. For young horses, the University of Minnesota divides by 301 for yearlings and 280 for weanlings.
Stand the horse square on firm, level ground. Merck measures the heart girth just behind the shoulders, at the base of the withers, and the body length from the point of shoulder to the point of rump; British Equestrian says the tape should be smooth and snug, but not tight, read as the horse breathes out. By our own arithmetic, a 74-inch heart girth and a 62-inch body length come to 74 × 74 × 62 ÷ 330 = about 1,029 pounds. Merck's author notes that, in her experience, the formula tends to slightly underestimate body weight.
Minnesota's breed-group equations add neck circumference and, for most types, height. A 2019 study found its equations for minis, saddle-type horses and Thoroughbreds within 4% of the scale weight, where previous equations and weight tapes were off by 5 to 25%.
2. A weight tape
A weight tape is useful for following changes in your horse's weight, but Merck and Ohio State say it usually reads lower than the scale, and the largest study we found saw that especially in heavier horses. Merck calls weight tapes "the least accurate of the tools available" but useful for tracking change. A 2023 analysis of more than 1,700 horses weighed both ways found that the tape generally underestimated body weight, particularly for horses with higher body weight, and was more accurate in pony breeds. A 2026 study of six horses found the opposite: both the tape and the formula overestimated, the tape by less. Whatever the study, Blue Cross advises using the same brand of tape every time.
3. Body condition scoring
A body condition score tells you whether the weight is right for your horse: on the US Henneke scale from 1 to 9, Merck advises keeping most horses between 4 and 6. World Horse Welfare puts it plainly: knowing your horse's weight is useful, "but it won't tell you if this is appropriate for them." On the Henneke scale, Merck treats a score of 6 as the upper limit of acceptable condition and 7 or more as overweight. Our horse body condition score guide shows where to feel and look, score by score, and covers the UK 0 to 5 fat score.
Why your horse's weight matters for daily care
Your horse's weight sets how much dewormer or medicine it gets and how much forage it needs, and extra weight raises the risk of laminitis, so a wrong number leads to a wrong amount. Ohio State notes that knowing the weight allows more accurate calculations of drug dosages, such as for dewormer, and the University of Florida warns that "Underdosing leads to the development of resistant parasites."
How much dewormer does a horse need for its weight?
Horse dewormers are dosed by body weight: the ivermectin dosage on the US Zimecterin label is "91 mcg ivermectin per lb (200 mcg/kg) body weight", and one syringe treats a horse of up to 1,250 pounds. The Zimecterin label explains that "Each weight marking on the syringe plunger delivers enough paste to treat 250 lb body weight", so you set the ring on the plunger to your horse's weight before you dose. The other common dewormers work the same way, each at its own rate, and all five below are given by mouth from a dosing syringe:
| Dewormer and label | Label dose | One syringe treats |
|---|---|---|
| Ivermectin, Zimecterin paste (US) | 91 mcg per lb (200 mcg/kg), single dose | Up to 1,250 lb, in 250 lb markings |
| Moxidectin, Quest Gel (US) | 0.4 mg per kg, single dose, for horses and ponies six months of age and older | Up to 1,500 lb, in 50 lb increments |
| Moxidectin, Equest Oral Gel (UK) | 400 µg per kg, single dose; not for foals less than 4 months | A 700 kg horse, with each tick mark for 25 kg |
| Fenbendazole, Panacur Paste 10% (US) | 2.3 mg per lb (5 mg/kg) for large and small strongyles and pinworms; 4.6 mg per lb (10 mg/kg) for foals and weanlings (less than 18 months of age) where ascarids are a common problem, and 4.6 mg per lb (10 mg/kg) daily for 5 consecutive days against encysted small strongyle larvae | At 5 mg/kg, one syringe deworms a 1,100 lb horse, or two 1,250 lb horses; sold in 25 g and 57 g syringes |
| Pyrantel pamoate, Strongid Paste (US) | 3 mg pyrantel base per lb, single oral dose | Up to 1,200 lb, in 300 lb markings |
The Zimecterin, Panacur and Strongid labels carry the same warning: "Do not underdose. Ensure each animal receives a complete dose based on a current body weight." With moxidectin, too much matters as well: the Quest label warns that "Extreme caution should be used when administering the product to foals, young and miniature horses, as overdosage may result in serious adverse reactions." Which dewormer your horse gets, and when, is your vet's decision; the same three US labels say that "Fecal examinations or other diagnostic tests and parasite management history should be used to determine if the product is appropriate", which is what worm egg count records are for. Medicines such as bute are dosed by weight too, as our guide to bute and Banamine explains.
How much hay does your horse's weight call for?
The Merck Veterinary Manual says current recommendations are that horses receive at least 1.5 to 2% of their body weight in forage per day on a dry matter basis, so a wrong weight means a wrong ration. The University of Kentucky's Bob Coleman puts it in bales: if you buy 100 days of hay for a 1,000-pound horse that actually weighs 1,200 pounds, you will be short by more than eight bales per horse. Our guide to how much hay a horse eats a day turns your horse's weight into pounds or kilos of hay.
What does extra weight do to a horse's health?
The University of Minnesota lists insulin resistance, equine metabolic syndrome and laminitis among the risks of excess weight, and Blue Cross adds heart disease. Overweight horses are common: in Minnesota's study, 42 percent of draft horses and 36 percent of saddle-type horses had a body condition score of 7 or higher, against 20 percent of adult minis, 14 percent of stock horses, ponies and Arabians and 2 percent of warmbloods.
How do you track your horse's weight over time?
Weigh or weight-tape your horse every two weeks, at a similar time of day and with the same tape, and keep a record so you can see the trend. British Equestrian calls it good practice to carry out an assessment every two weeks or so and log the findings, and World Horse Welfare and Blue Cross also advise every two weeks; we found no US source that sets a fixed interval.
The right weight shifts with the season, the work and the horse's age. The University of Minnesota warns that in winter, heavy hair coats can often hide weight loss, so run your hands over your horse rather than judging by eye. Ohio State notes that a Thoroughbred in heavy training may have a body condition score of 4, while for an older horse going into winter a score of 6 may be more appropriate, and it suggests keeping photographs alongside your written records of each evaluation.
More questions about horse weight
How much does a horse weigh in kg?
Light riding horses in Minnesota's study averaged about 425 to 590 kg, ponies about 327 kg, adult minis about 117 kg and draft horses about 851 kg. Nutrition handbooks use 500 kg as the standard adult horse.
How much does a horse weigh in tons?
A 1,100 lb horse weighs a little over half a US ton of 2,000 pounds. Draft horses in Minnesota's study averaged 1,877 pounds, just under a ton.
