Formula and interpretation
What the horse hay calculator does
The calculator keeps the low and high range visible while you select a working percentage. A 1,000 lb horse at 2% produces a 20 lb daily target. Over 30 days, that is 600 lb before waste. At 10% waste, HayRatio plans for 666.7 lb; at 50 lb per bale, it rounds 13.33 up to 14 bales.
Weigh hay instead of counting flakes
Flakes vary with bale size, density, cutting, and how they separate. If you use the optional flake field, weigh several representative flakes and enter the average. Treat the output as a portioning aid, not a claim that every flake is identical.
When this calculator is out of scope
Do not use this general tool to plan for foals, growing horses, pregnant or lactating mares, acute illness, recovery, or horses needing condition-specific nutrition. Ask your veterinarian or a qualified equine nutritionist for an individualized plan.
Review the versioned sources and assumptions or continue with the focused bale calculator.
Horse hay calculator questions
How much hay should a 1,000 lb horse eat?
For planning, 1.5%–2.5% of body weight is 15–25 lb of total feed per day, with 20 lb at a user-selected 2%. Actual hay depends on pasture, other feed, hay quality, body condition, workload, climate, and professional guidance.
Why does the calculator round bales up?
Hay is normally bought as whole bales. HayRatio divides the waste-adjusted planning total by average bale weight, then rounds the purchase quantity up so the plan does not undercount a partial bale.
Does HayRatio balance a complete horse diet?
No. It provides forage planning ranges only. It does not calculate nutrients or prescribe grain, concentrates, supplements, salt, water, or condition-specific diets.