Horse Feed Calculator
Calculate balanced daily equine feed rations based on body weight and physical workload. Formulated according to the National Research Council (NRC) Nutrient Requirements of Horses, ensuring adequate long-stem fiber for hindgut gastrointestinal health.
Estimated or scale weight of the horse (e.g. 500 kg = 1,100 lbs for an average Thoroughbred/Quarter Horse)
Intensity of weekly exercise and physical training
Total daily nutritional dry matter required to sustain body condition
How to Use This Calculator
- Weigh your horse using an equine scale or weight tape around the heart girth.
- Enter their body weight in kilograms (500 kg ≈ 1,100 lbs).
- Select their physical exercise and workload category.
- Inspect the recommended total daily feed, minimum hay weight, and concentrate portions.
Formula & Calculation Methodology
NRC equine standards establish that horses must consume 1.5% to 2.5% of their body weight daily in dry matter. To prevent gastric ulcers and hindgut acidosis, forage must comprise at least 60% to 100% of the ration depending on workload.
Worked Example
500 kg adult horse at maintenance (idle pasture)
500 kg performance horse in moderate training
Frequently Asked Questions
Why is minimum forage so critical for horses?↓
Horses are non-ruminant hindgut fermenters. Insufficient fiber (less than 1% to 1.5% of body weight in forage) causes stomach acid buildup, gastric ulcers, stereotypic cribbing, and life-threatening cecal impaction colic.
How many flakes of hay is 8.5 kg?↓
A typical 2-string small square hay bale weighs 20–25 kg (45–55 lbs) and contains 10–12 flakes. Therefore, 8.5 kg is roughly 4 to 5 average flakes of pasture grass hay.
How often should horses be fed daily?↓
Because a horse’s stomach continuously secretes gastric acid, daily rations should be divided into at least two to three separate feedings, or provided as continuous slow-feed hay access.
What is a limitation of simple body-weight feed calculations?↓
Calculations assume average forage nutrient density; actual hay nutritional analysis (crude protein, digestible energy, non-structural carbohydrates) may require targeted mineral supplementation.
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Source Citation & Disclaimer
Informational tool only; not licensed tax, legal, or financial advice.