Beginner horse care
A horse needs roughly 38 to 45 litres of water a day, a stomach that never holds more than about 15 litres, and a grooming routine done in a fixed order. This page gives the daily numbers, the base-4 hands system, and the step-by-step procedure for a first-time handler.
| Item | Value | Unit | Notes |
|---|---|---|---|
| Daily water, 450 kg horse | 38–45 | litres | Higher in hot weather or on dry forage |
| Water under hard work or lactation | up to 4× | times normal | May exceed 100 L per day |
| Stomach capacity | 15 | litres | Begins to empty at about two-thirds full |
| Stomach working fill | 7.6 | litres | Preferred fill for good function |
| Protein share, adult diet | 8–10 | percent | Most adult horses need no more |
| One hand | 101.6 | millimetres | Exactly four inches, fixed in 1540 |
| Hoof trimming interval | 4–10 | weeks | Longer intervals cause discomfort |
An average 450 kg horse drinks 38–45 litres of water per day.
That baseline rises in hot weather and on dry forage. Under hard work or during lactation, a horse's water requirement can be as much as four times the normal figure, so a working or nursing horse may need well over 100 litres a day.
Water makes up 62–68% of a horse's body weight, and a horse becomes dangerously dehydrated if it loses 8–10% of its natural body water. In practice this means fresh water should be available at all times, and intake should be watched rather than rationed.
A horse that drinks noticeably less than its usual amount, or that stops drinking, is a concern long before any other sign appears. The daily volume is the first number a beginner should learn to estimate.
The stomach holds only 15 L and works best at about 7.6 L, so small frequent meals suit a horse better than two large ones.
The average horse has a stomach capacity of only 4 US gallons, about 15 litres. It functions best when it contains roughly 2 US gallons, about 7.6 litres, and it begins to empty once it is two-thirds full.
Horses prefer to eat small amounts of food steadily throughout the day. That natural pattern matches the stomach's small working volume and its early emptying point, which is why dividing the daily ration into several small feedings is preferred over two large ones.
Most adult horses only require 8–10% protein in their diet. Higher protein is not automatically better; the requirement is modest and the daily ration should be built around forage with the protein share kept in that range.
One hand is 101.6 mm, exactly four inches, and the subdivision is base 4, not decimal.
Height is expressed as a whole number of hands plus a remainder of 0 to 3 inches. A horse measuring 62 inches is 15.2 hands, because 15 × 4 + 2 = 62. The notation 15.5 hands is impossible: after 15.3 comes 16.0, never 15.4 or 15.5.
The hand was standardised at four inches by a statute of King Henry VIII, the Horses Act 1540. That fixed length is why the modern figure is 101.6 mm and why conversions from centimetres are exact rather than approximate.
To convert, divide the height in centimetres by 10.16 to get hands and a decimal fraction, then read the fraction back into inches using the base-4 rule. A horse of 162 cm is about 15.9 hands, written 15.3, not 15.9.
Only the 1540 statute is a historical date; the rest are recurring intervals from daily care.
Each item maps to one number or one step in the daily routine.
The list below names the reference topics behind the numbers on this page.