How much hay does a cow eat per day?

A typical beef cow eats roughly 2–3% of her body weight in hay daily. For a 1,000 lb cow that is about 20–30 lbs per day. Use 25 lbs as a common starting point and adjust for your animals' size and condition.

What is the average weight of a hay bale?

Small square bales typically weigh 40–60 lbs. Large square bales range from 800–1,200 lbs. Round bales commonly weigh 800–1,500 lbs depending on size and hay density. Enter the actual weight from your supplier for the most accurate result.

Why add a waste buffer?

Hay losses from weathering, spoilage, trampling, and selective feeding typically run 5–20% for round bales fed outside and 3–5% for bales fed under cover. A 10–15% buffer is a safe default for outdoor winter feeding.

Does this work for horses, sheep, and goats?

Yes. Just enter the correct daily intake for each species. Horses typically eat 15–25 lbs/day, sheep and goats 4–8 lbs/day. If you have a mixed herd, calculate each species separately and add the totals.

How do I convert bale count to cost?

Multiply the number of bales by your local price per bale. The calculator shows the total bale count; multiply that by your cost to get a seasonal feed budget estimate.

Hay Bale Calculator

Enter your herd size, feeding period, daily hay intake, and bale weight to find out exactly how many bales you need.

Feed Inputs

Number of Animals

Daily Hay Intake per Animal (lbs)

Typical: cattle 20–30 lbs, horses 15–25 lbs, sheep/goats 4–8 lbs

Feeding Period (days)

Winter feeding is often 120–180 days depending on your region

Weight per Bale (lbs)

Small square ≈ 50 lbs · Large square ≈ 1,000 lbs · Round bale ≈ 1,200 lbs

Waste Buffer (%) (optional)

Accounts for spoilage and trampling. 10–15% is typical for outdoor feeding.

Price per Bale ($) (optional)

Results

Fill in the inputs and click Calculate.

Summary

The Hay Bale Calculator helps farmers and ranchers quickly estimate how many hay bales are required to feed a herd over a specified period. By entering the number of animals, daily hay consumption per animal, total feeding days, and the average weight of a bale, you get an accurate bale count with optional waste buffer. Use it to plan winter feed purchases, compare costs across bale sizes, and avoid running short mid-season.

How it works

Enter the number of animals in your herd.
Set the daily hay intake per animal in pounds.
Choose the total number of feeding days.
Enter the average weight of a single bale in pounds.
Optionally add a waste buffer percentage to account for spoilage.
The calculator instantly shows the total bales needed and total hay weight.

Use cases

Plan winter hay purchases before the season starts.
Compare round vs. square bale economics by adjusting bale weight.
Estimate haul and storage capacity needed for a full season.
Budget feed costs by multiplying bale count by local price per bale.
Adjust rations quickly when animal count or feeding days change.
Share feed estimates with suppliers or co-op partners.

Frequently Asked Questions

Last updated: 2026-05-29 · Reviewed by Nham Vu