Horse Feed Amount Calculator

About the Horse Feed Amount Calculator

A horse's diet should consist primarily of forage (hay and/or pasture), supplemented with grain or concentrate feed as needed for the workload. The total daily dry matter intake for a healthy horse is approximately 1.5-3% of body weight, with the majority coming from forage. A 1,000-pound horse needs roughly 15-30 pounds of total feed per day.

Forage should make up at least 50-100% of the diet depending on workload. Horses in light work or at maintenance may need only quality forage. Horses in moderate to heavy work require supplemental grain or concentrate to meet energy demands. The exact ratio depends on body condition, age, reproductive status, and exercise intensity.

This calculator estimates daily forage and grain amounts based on your horse's weight and workload. It splits the recommendation into hay/forage versus concentrate, helping you build a balanced feeding plan.

When This Page Helps

Improper feeding causes colic, laminitis, ulcers, and obesity — the most common equine health problems. Too much grain relative to forage disrupts hindgut fermentation. It gives weight-based forage-first recommendations to prevent diet-related health issues.

How to Use the Inputs

1. Enter your horse's body weight in pounds (use a weight tape if no scale available).
2. Select the workload level: maintenance, light, moderate, or heavy.
3. Review the total daily feed amount.
4. Note the forage-to-grain ratio recommendation.
5. Split hay into 2-3 feedings per day minimum.
6. Adjust based on body condition score (target BCS 5-6 out of 9).

Example Calculation

Tips & Best Practices

• Never feed more than 5 lbs of grain per meal — split large amounts into multiple feedings.
• Forage should always be the foundation — a horse should never go more than 4 hours without forage.
• Use a weight tape monthly to track body condition changes.
• Introduce any feed changes gradually over 7-14 days to prevent colic.
• Clean, fresh water must be available at all times (horses drink 5-10 gallons/day).
• A body condition score of 5-6 on the Henneke 1-9 scale is ideal for most horses.

The Forage-First Principle

Horses evolved to eat forage 16-18 hours per day. Their digestive system is designed for continuous fermentation of fiber in the hindgut. When forage is restricted and replaced with grain, the cecum pH drops, beneficial bacteria die, and digestive upset follows. Even high-performance horses should receive at least 50% of their diet as forage.

Reading Feed Labels

Commercial horse feeds list guaranteed analyses including crude protein, fat, and fiber. Match the feed to your horse's needs: maintenance feeds have 10-12% protein, performance feeds 12-14%, and growth feeds 14-16%. Fat content above 6% provides concentrated energy without the glycemic impact of high-starch grain.

Seasonal Feeding Adjustments

Horses may need 10-20% more feed in winter to maintain body temperature, especially if unblanketed. In summer on lush pasture, many horses need restricted grazing to prevent obesity and laminitis. Monitor body condition monthly and adjust feeding plans seasonally.

Frequently Asked Questions

• How much hay does a horse eat per day?

  A horse should eat at minimum 1.5% of body weight in forage daily. A 1,000-lb horse needs at least 15 lbs of hay per day, and more if not receiving grain. Hay should be available throughout the day to mimic natural grazing behavior.

• Can a horse eat too much hay?

  Most horses self-regulate hay intake. However, overweight horses or those prone to laminitis may need restricted access. In these cases, use slow-feed hay nets with small holes to extend eating time while limiting total intake to 1.5% body weight.

• When does a horse need grain?

  Horses in moderate to heavy work, growing youngsters, pregnant/lactating mares, and underweight horses may need grain supplementation. A horse at maintenance with quality forage often doesn't need grain — just a ration balancer for vitamins and minerals.

• What type of hay is best?

  Grass hay (timothy, orchard, bermuda) is suitable for most adult horses. Alfalfa is higher in protein and calories — good for performance horses and growing foals but too rich for easy keepers. A grass/alfalfa mix offers a balanced option.

• How do I know if my horse is the right weight?

  Use the Henneke Body Condition Scoring system (1-9 scale). You should be able to feel the ribs with light pressure but not see them prominently. A score of 5-6 is ideal. Scores of 7+ indicate obesity; scores of 4 or below indicate weight loss.

• Should I soak my horse's hay?

  Soaking hay for 30-60 minutes reduces sugar content (NSC) by 30-40%, beneficial for metabolically challenged horses (Cushing's, insulin resistance, laminitis-prone). It also reduces dust for horses with respiratory issues. Drain and feed promptly.