This tool provides a general estimate and does not replace professional veterinary advice.
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What is the Horse Feed Ration Calculator?
The Horse Feed Ration Calculator calculates daily feed ration in kilograms for horses based on weight and workload. Overfeeding is one of the most common and most preventable health problems in pets, while underfeeding a growing or active animal can slow development or sap energy.
Expect roughly 25-30 years with a horse, which is worth factoring into any long-term plan. Diet-wise they are a herbivore, which shapes almost every feeding decision you make. Horses need roughly one to two acres of grazing per animal, shelter from wind and sun, companionship of other horses, and near-constant access to forage since their stomachs are built for trickle feeding. Health problems that show up most often in horses include colic, laminitis, equine gastric ulcer syndrome, which is part of why tracking this over time pays off.
Horse quick facts
| Measure | Horse |
|---|---|
| Typical lifespan | 25–30 years |
| Adult weight | 66–1543 lb (30–700 kg) |
| Diet | Herbivore |
| Mature at | About 4 years |
| Pregnancy | 320–362 days |
| Litter size | 1–1 |
| Humidity | 40–70% |
How does the Horse Feed Ration Calculator work?
The estimate starts from a resting-energy formula based on body weight, then adjusts for activity level, life stage and, where relevant, the specific nutritional profile of horses. Use it to know roughly where you stand and what to ask about, not to rule anything in or out on its own.
What changes the answer
- Body weight: the single biggest driver of daily calorie needs
- Activity level: a sedentary indoor animal needs meaningfully less than an active or working one
- Life stage: since growing, pregnant or nursing animals need more energy per kilogram than a stable adult
- Spay/neuter status: which typically lowers metabolic needs somewhat
How do you use the Horse Feed Ration Calculator?
- Enter the body weight in whichever unit you use (lb, oz, kg)
- Pick your activity level (Low, Moderate, High)
- Enter the calories per cup of your food
- Press Calculate, then read the result alongside the sources listed below
Bring the number to your next appointment. Vets can work with a figure and a date far more easily than with "he seems a bit off lately".
For related questions, see the other nutrition tools or browse every horse tool.
Before you rely on this
This calculation assumes a healthy adult horse with no complicating conditions. Pregnancy, recovery from illness, medication and significant age at either end of the scale all change what is appropriate. When in doubt, the safest move is to take the number to a vet and ask whether it fits your particular animal.
Sources and references
The formulas, reference ranges and species data behind the Horse Feed Ration Calculator come from these veterinary references, professional bodies and published research.
- NRCNutrient Requirements of Horses (National Academies)nap.nationalacademies.org(opens in a new tab)
- University of KentuckyEquine Programsequine.ca.uky.edu(opens in a new tab)
- Penn State ExtensionEquineextension.psu.edu(opens in a new tab)
- wsava.orgWSAVA Global Nutrition Guidelineswsava.org(opens in a new tab)
- Merck Veterinary ManualNutrition: Horsesmerckvetmanual.com(opens in a new tab)
- Built on veterinary referencesFormulas and ranges come from veterinary manuals, university research and welfare bodies, listed above for you to check.
- Instant resultsNo page reload, no waiting and no account. Enter your details and the result appears straight away.
- Private by designCalculations run in your browser. Nothing you enter is stored on our servers or shared with anyone.
- Always freeEvery XpertsPet tool is free to use, with no premium tier and nothing to sign up for.