Last updated: October 7, 2026
If you buy hay by the bale but feed it by the flake, it’s easy to lose track of how much your horse is really eating and how long your hay will last.
The trick is to weigh a few flakes first. From there, the math is simple.
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How Many Flakes Are in a Bale of Hay?
A flake is one of the compressed layers that make up a small square bale. When you cut the strings, the bale separates along those layers. Most two-string bales have somewhere around 12 to 16 flakes, but there’s no standard. The count depends on the hay and how tightly it was packed.
Around here, a lot of hay gets baled on halves, with the landowner and the person baling splitting the bales 50/50. My friend Roy Anthony baled that way for many people in our area, and the person running the baler has a lot to do with how thick the flakes come out.
That’s why the flake count by itself doesn’t mean much:
| Bale weight | If it has 12 flakes | If it has 16 flakes |
|---|---|---|
| 40 lb | About 3.3 lb per flake | 2.5 lb per flake |
| 60 lb | 5 lb per flake | About 3.8 lb per flake |
Those are averages, not the weight of every flake, and bale weights vary a lot by region and hay type.
Why Flake Weight Matters More Than Flake Count
Two flakes that look the same can be pounds apart, and a new supplier may bale differently from your last one. That’s why Kentucky Equine Research recommends feeding hay by weight instead of by the flake.
A fishing or luggage scale works fine. Hang an empty hay net from the scale and zero it, then add the flakes you want to weigh. Do that with a few flakes from a new load and you’ll know how many make up your horse’s ration. If your horse gets 20 pounds a day and your flakes average 4 pounds, that’s five flakes. If they average 3 pounds, it’s closer to seven.
How Long Does a Bale of Hay Last One Horse?
To figure how long a bale will last, start with how many pounds of hay your horse eats each day. University of Minnesota Extension uses 20 pounds a day as its example for a 1,000-pound idle adult horse getting its forage from hay. I’ll use that amount below, but your horse’s needs may be different, especially if pasture supplies part of its forage.
| Bale weight | Days per bale |
|---|---|
| 40 lb | About 2 days |
| 50 lb | About 2.5 days |
| 60 lb | About 3 days |
| 70 lb | About 3.5 days |
| 100 lb (three-string) | About 5 days |
Feeding hay on the ground costs you more than most people think. One University of Minnesota study, reported by Penn State Extension, found horses wasted about 13% of small square bale hay fed on the ground, compared with 1 to 5% in a feeder. At 13% waste, a 40-pound bale lasts closer to a day and three-quarters.
If you use hay nets, hang them securely and high enough that a horse can’t catch a hoof or shoe in one, even when the net is nearly empty.
How Many Bales Does a Horse Need a Month?
At 20 pounds a day, you’re looking at about 600 pounds of hay in a 30-day month, or roughly 7,300 pounds a year.
| Bale weight | Bales per month | Whole bales per month with 10% added | Bales per year, before waste |
|---|---|---|---|
| 40 lb | 15 | 17 | About 183 |
| 50 lb | 12 | 14 | About 146 |
| 60 lb | 10 | 11 | About 122 |
Pasture, workload, body condition, hay quality, and waste can change your real number quite a bit. Plan on some extra for storage and feeding losses. In its winter hay example, University of Maryland Extension allows 5% for indoor storage loss and another 5% for feeding waste, and your allowance may need to be higher depending on how you store and feed.
These numbers also help when someone else is buying your hay. When I had horses with a trainer, I used the expected bale usage to check the hay charges on my bill. If you board, ask how hay is measured and billed, and use the cost of a bale of hay in your area to turn these bale counts into a monthly feed budget.
How Long Does a Round Bale Last?
The same math works for round bales. An 800-pound round bale would feed one 1,000-pound horse at 20 pounds a day for about 40 days on paper, and two horses for about 20. Real life is usually shorter. University of Minnesota research found horses wasted 57% of a round bale fed without a feeder, compared with 5 to 33% with one.
That 40-day figure is a supply calculation, not a promise that an opened bale will stay fit to feed that long. Weather and trampling can spoil it first. A round bale can also be moldy inside even when the outside looks fine, so check it as you go. Horses shouldn’t eat moldy hay. A friend of mine feeds round bales under a run-in shed to keep the weather off them.
What Changes How Long a Bale Lasts?
Size and work. Bigger horses generally need more hay. Hard work raises calorie needs, but that doesn’t always mean feeding more hay, since some horses need a richer hay or grain instead. Working out how much hay your horse eats per day is the place to start.
Pasture. Good pasture can cut supplemental hay a lot during the growing season, then the full ration comes back in winter or drought.
Weather. Digesting fiber produces heat, so many horses eat more forage in cold weather.
Waste. If your hay is disappearing faster than the math says it should, look at where it’s ending up before you blame the horse. If your horse is leaving a lot of it untouched, check the hay itself, too.
About Miles Henry
Racehorse Owner & Author | 30+ Years in Thoroughbred Racing
Miles Henry (legal name: William Bradley) is a professional horseman based in Folsom, Louisiana. He holds Louisiana Racing License #67012 and has spent over three decades managing Thoroughbreds at premier tracks including Fair Grounds, Delta Downs, and Evangeline Downs.
Expertise & Hands-On Experience: Beyond the track, Miles has decades of experience in specialized equine care, covering everything from hoof health and nutrition to training protocols for Quarter Horses, Friesians, and Paints. Every guide on Horse Racing Sense is rooted in this “boots-on-the-ground” perspective.
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