How Much Does a Horse Weigh? A Practical Guide

The range across the species

Group	Weight range	Metric
Miniature horse	150–350 lb	70–160 kg
Pony	400–900 lb	180–410 kg
Light riding horse	900–1,300 lb	410–590 kg
Warmblood	1,200–1,450 lb	545–660 kg
Draft horse	1,800–2,200 lb	820–1,000 kg
Record largest (Shire)	over 3,000 lb	over 1,360 kg

That is a twenty-fold range, which is exactly why vague guidance like "feed a scoop twice a day" fails. Everything in horse care scales with the individual animal.

Why the number matters

Feeding. Rations are set as a percentage of body weight — 1.5–2% as forage, plus concentrate according to work. See the feed calculator.
Medication. Dewormers and many drugs are dosed by weight. Under-dosing drives resistance; over-dosing risks toxicity.
Water. Expected intake is about 0.5–1 gallon per 100 lb of body weight per day.
Anaesthesia and emergency care. Your vet will want the best weight estimate available, and it helps to have one on record.
Monitoring health. Unexplained weight loss is one of the earliest and most reliable illness signals.

Three ways to get the number

Method	Accuracy	Best for
Livestock scale	exact	Weight-critical dosing, youngstock, large horses
Weight tape / girth and length formula	±3–5% on average horses	Monthly tracking, feeding, routine worming
Height and build estimate	±10% or worse	Sanity checks and rough planning only

The tape method is the practical default: cheap, repeatable, and accurate enough for feeding. Run the measurements through the horse weight calculator and read how to use a weight tape for the technique.

How weight changes over a life

A foal is born at roughly 10% of its mother’s weight and reaches about 60–65% of adult weight by its first birthday. From there growth slows: 24 months brings most horses to 85–90% of adult weight, and full maturity arrives between four and six years depending on breed.

In adulthood, weight is far more volatile than owners expect. A horse can gain 50–100 lb of fat in a spring flush of grass without any visible change, and lose as much again through a cold, wet winter. That is why the number you track should be paired with a condition score — see body condition scoring.

Frequently asked questions

How much does a horse weigh in kg?

A light riding horse is roughly 410–590 kg, a pony 180–410 kg and a draft horse 820–1,000 kg.

How much does a horse weigh at birth?

About 8–12% of the dam’s weight, commonly 90–150 lb (40–70 kg) in light breeds.

What is the heaviest horse ever recorded?

Shire horses have exceeded 3,000 lb (1,360 kg). The Guinness record for the tallest horse also belongs to the Shire breed.

Why does my horse weigh more in winter on less grass?

Less movement, more conserved hay and a thicker coat all contribute, and low temperatures can push a horse to eat more. Tape and condition score monthly rather than judging by eye.

Related tools and guides

Sources and method

Ontario Ministry of Agriculture, Food and Rural Affairs — Estimating body weight for horses.
NSW Department of Primary Industries — Primefact 928: Estimating a horse’s condition and weight.
Carroll, C.L. & Huntington, P.J. (1988) — the girth-and-length body weight formula used on weight tapes.

Page last reviewed 2026-10-16. Results are estimates from published formulas and are not veterinary advice.