Horse Grain Feed Calculator: How Much Grain Does My Horse Need?

🐴 Horse Grain Feed Calculator

Calculate daily and weekly grain requirements for your horse based on weight, activity, and feed type

Quick Presets
⚙️ Calculator Inputs
✅ Your Horse Grain Feed Results
🌿 Feed Type Nutritional Reference
1,540
Oats kcal/lb
1,650
Corn kcal/lb
1,590
Barley kcal/lb
1,500
Sweet Feed kcal/lb
1,480
Pelleted kcal/lb
1,250
Wheat Bran kcal/lb
1,450
Soy Meal kcal/lb
1,580
Milo kcal/lb
📋 Daily Grain Feeding Guidelines by Horse Weight & Activity
Horse Weight Maintenance Light Work Moderate Work Heavy Work Performance
500 lbs (227 kg) 0–1.5 lbs 1–2.5 lbs 2–4 lbs 3–5 lbs 4–6 lbs
800 lbs (363 kg) 0–2 lbs 2–4 lbs 3–5 lbs 5–7 lbs 6–9 lbs
1000 lbs (454 kg) 0–2.5 lbs 3–5 lbs 4–7 lbs 6–9 lbs 8–11 lbs
1100 lbs (499 kg) 0–3 lbs 3–5.5 lbs 5–8 lbs 7–10 lbs 9–12 lbs
1200 lbs (544 kg) 0–3 lbs 4–6 lbs 5–9 lbs 8–11 lbs 10–14 lbs
1500 lbs (680 kg) 0–4 lbs 5–7.5 lbs 7–11 lbs 10–14 lbs 12–17 lbs
📦 Feed Bag Quantities Reference
Bag Size Daily Use (5 lbs/day) Days Per Bag Bags Per Month Bags Per Year
50 lbs 5 lbs/day 10 days 3 bags 36.5 bags
50 lbs 8 lbs/day 6.25 days 4.8 bags 58.4 bags
50 lbs 10 lbs/day 5 days 6 bags 73 bags
40 lbs 5 lbs/day 8 days 3.75 bags 45.6 bags
40 lbs 8 lbs/day 5 days 6 bags 73 bags
25 lbs 5 lbs/day 5 days 6 bags 73 bags
📐 Grain % of Body Weight by Activity Level
Activity Level Grain % of Body Wt Example: 1000 lb Horse Example: 1200 lb Horse Max Grain Per Meal
Maintenance 0–0.5% 0–5 lbs/day 0–6 lbs/day 3 lbs
Light Work 0.5–1.0% 5–10 lbs/day 6–12 lbs/day 4 lbs
Moderate Work 0.75–1.25% 7.5–12.5 lbs/day 9–15 lbs/day 5 lbs
Heavy Work 1.0–1.5% 10–15 lbs/day 12–18 lbs/day 5 lbs
Performance 1.25–2.0% 12.5–20 lbs/day 15–24 lbs/day 5 lbs
💡 Tip 1 – Always Weigh Your Feed: Feed scoops vary significantly in how much they hold. A 1-quart scoop of oats weighs about 1 lb, but the same scoop of corn weighs nearly 1.7 lbs. Always use a kitchen or feed scale for accurate grain measurement rather than relying on scoop volume.
💡 Tip 2 – Never Exceed 5 lbs Grain Per Meal: Feeding more than 4–5 lbs of grain in a single meal overwhelms the horse's small intestine and can cause colic or laminitis. If your horse needs 10 lbs/day, split it into 3 or more feedings. Forage (hay) should always be fed before grain and should make up at least 1.5–2% of body weight daily.

Horse grain feed help a lot so that horses stay healthy, even so it not always needed for each of them. The basic part of the food for any horse must be made up of hay. So hay and feed comes first.

One adds extras, as grains or pellets, for filling gaps of nutrients in that hay.

Hay and Grain for Horses

Horses need carbohydrates as main source of energy, together with fats for extra force, proteins for building the body, minerals, vitamins and water. Usual types of feed include hay, pasture and extras as oats. The main grains, that one gives to horses, are oats, barley and corn.

One uses also wheat and milo, but less commonly. Oats stay the favourite and most relibale grain for feed horses.

Oats form bigger grain, so that horses chew them well to break the bark of the seed, without need of extra work. Oat flour digests much more easily than corn or barley flour in raw state. So one can give oats whole and raw.

Even so, the decision about giving raw oats must depend on every horse especially. It is useful to watch the dung of the horse closely when one starts too feed them.

Grain delivers extra fats and energy, what helps to quickly reach good shape. Even so not every horse needs grain. Horse, that walks on good pasture during summer, commonly does not need other feed, although a salt block and sometimes a vitamin-mineral supplement is still useful.

Especially light work horses must not get grain. They receive calories mostly from pasture, and extra feed serves only to fill lacking minerals.

Things that affect the food needs of a horse are breed, weight, physical state, age, growing phase, breeding situation and level of training. There is not one right feed, because each horse can live well or have troubles on different diets. For one horse the ideal could be without grain entirely.

When a horse does need extra feed, the form of that feed depends on several things.

One never gives big amounts of grain during one meal. Horses are mostly fiber digesters, so access to hay through the day is the most important. Too much oats or grain can cause excess of buildup in the belly, what can lead to colic and founder.

Processed feeds have the plus that they are precooked, so they escape risk of buildup.

Some feeds are made for separate goals. Mixed feeds can meet energy needs for pregnant mares and active sport horses. There are also organic types, with items as organic corn, organic oats and organic roasted soy flakes.

When a horse gets good pasture and the right amount of the right feed, extra supplements usually are not needed. Sensibleswing can help well for horses in light work, that do not need many extra calories.

Horse Grain Feed Calculator: How Much Grain Does My Horse Need?

Leave a Comment